IV

There was only one new fact in the couple of columns devoted to the mystery. Mrs. Blumenstein had died from chloroform poisoning. She was of a stout habit, and the thieves were not skilled in the administration of the anæsthetic.

"It's murder none the less," said Hanaud, and he gazed straight at Joan, asking her by the direct summons of his eyes what she was going to do.

"I must tell my story to the police," she replied painfully and slowly. But she did not hesitate; she was announcing a meditated plan.

Hanaud neither agreed nor differed. His face was blank, nd when he spoke there was no cordiality in his voice. "Well," he asked, "and what is it that you have to say to the police, miss? That you went into the room to steal, and that you were attacked by two strangers, dressed as apaches, and masked? That is all?"

"Yes."

"And how many men at the Semiramis ball were dressed as apaches and wore masks? Come! Make a guess. A hundred at the least?"

"I should think so."

"Then what will your confession do beyond—I quote your English idiom—putting you in the coach?"

Mr. Ricardo now smiled with relief. Hanaud was taking a definite line. His knowledge of idiomatic English might be incomplete, but his heart was in the right place. The girl traced a vague pattern on the tablecloth with her fingers.

"Yet I think I must tell the police," she repeated, looking up and dropping her eyes again. Mr. Ricardo noticed that her eyelashes were very long. For the first time Hanaud's face relaxed.

"And I think you are quite right," he cried heartily, to Mr. Ricardo's surprise. "Tell them the truth before they suspect it, and they will help you out of the affair if they can. Not a doubt of it. Come, I will go with you myself to Scotland Yard."

"Thank you," said Joan, and the pair drove away in a cab together.

Hanaud returned to Grosvenor Square alone and lunched with Ricardo.

"It was all right," he said. "The police were very kind. Miss Joan Carew told her story to them as she had told it to us. Fortunately, the envelope with the aluminium chain had already been delivered, and was in their hands. They were much mystified about it, but Miss Joan's story gave them a reasonable explanation. I think they are inclined to believe her; and, if she is speaking the truth, they will keep her out of the witness-box if they can."

"She is to stay here in London, then?" asked Ricardo.

"Oh, yes; she is not to go. She will present her letters at the Opera House and secure an engagement, if she can. The criminals might be lulled thereby into a belief that the girl had kept the whole strange incident to herself, and that there was nowhere even a knowledge of the disguise which they had used." Hanaud spoke as carelessly as if the matter was not very important; and Ricardo, with an unusual flash of shrewdness, said:

"It is clear, my friend, that you do not think those two men will ever be caught at all."

Hanaud shrugged his shoulders.

"There is always a chance. But listen. There is a room with a hundred guns, one of which is loaded. Outside the room there are a hundred pigeons, one of which is white. You are taken into the room blindfold. You choose the loaded gun and you shoot the one white pigeon. That is the value of the chance."

"But," exclaimed Ricardo, "those pearls were of great value, and I have heard at a trial expert evidence given by pearl merchants. All agree that the pearls of great value are known; so, when they come upon the market———"

"That is true," Hanaud interrupted imperturbably. "But how are they known?"

"By their weight," said Mr. Ricardo.

"Exactly," replied Hanaud. "But did you not also hear at this trial of yours that pearls can be peeled like an onion? No? It is true. Remove a skin, two skins, the weight is altered, the pearl is a trifle smaller. It has lost a little of its value, yes—but you can no longer identify it as the so-and-so pearl which belonged to this or that sultan, was stolen by the vizier, bought by Messrs. Lustre and Steinopolis, of Hatton Garden, and subsequently sold to the wealthy Mrs. Blumenstein. No, your pearl has vanished altogether. There is a new pearl which can be traded." He looked at Ricardo. "Who shall say that those pearls are not already in one of the queer little back streets of Amsterdam, undergoing their transformation?"

Mr. Ricardo was not persuaded because he would not be. "I have some experience in these matters," he said loftily to Hanaud. "I am sure that we shall lay our hands upon the criminals. We have never failed."

Hanaud grinned from ear to ear. The only experience which Mr. Ricardo had ever had was gained on the shores of Geneva and at Aix under Hanaud's tuition. But Hanaud did not argue, and there the matter rested.

The days flew by. It was London's play-time. The green and gold of early summer deepened and darkened; wondrous warm nights under England's pale blue sky, when the streets rang with the joyous feet of youth, led in clear dawns and lovely glowing days. Hanaud made acquaintance with the wooded reaches of the Thames; Joan Carew sang "Louise" at Covent Garden with notable success; and the affair of the Semiramis Hotel, in the minds of the few who remembered it, was already added to the long list of unfathomed mysteries.

But towards the end of May there occurred a startling development. Joan Carew wrote to Mr. Ricardo that she would call upon him in the afternoon, and she begged him to secure the presence of Hanaud. She came as the clock struck; she was pale and agitated; and in the room where Calladine had first told the story of her visit she told another story which, to Mr. Ricardo's thinking, was yet more strange and—yes—yet more suspicious.

"It has been going on for some time," she began. "I thought of coming to you at once. Then I wondered whether, if I waited—oh, you'll never believe me!"

"Let us hear!" said Hanaud patiently.

"I began to dream of that room, the two men disguised and masked, the still figure in the bed. Night after night! I was terrified to go to sleep. I felt the hand upon my mouth. I used to catch myself falling asleep, and walk about the room with all the lights up to keep myself awake."

"But you couldn't," said Hanaud with a smile. "Only the old can do that."

"No, I couldn't," she admitted; "and—oh, my nights were horrible until"—she paused and looked at her companions doubtfully—"until one night the mask slipped."

"What—?" cried Hanaud, and a note of sternness rang suddenly in his voice. "What are you saying?"

With a desperate rush of words, and the colour staining her forehead and cheeks, Joan Carew continued:

"It is true. The mask slipped on the face of one of the men—of the man who held me. Only a little way; it just left his forehead visible—no more."

"Well?" asked Hanaud, and Mr. Ricardo leaned forward, swaying between the austerity of criticism and the desire to believe so thrilling a revelation.

"I waked up," the girl continued, "in the darkness, and for a moment the whole scene remained vividly with me—for just long enough for me to fix clearly in my mind the figure of the apache with the white forehead showing above the mask."

"When was that?" asked Ricardo.

"A fortnight ago."

"Why didn't you come with your story then?"

"I waited," said Joan. "What I had to tell wasn't yet helpful. I thought that another night the mask might slip lower still. Besides, I—it is difficult to describe just what I felt. I felt it important just to keep that photograph in my mind, not to think about it, not to talk about it, not even to look at it too often lest I should begin to imagine the rest of the face and find something familiar in the man's carriage and shape when there was nothing really familiar to me at all. Do you understand that?" she asked, with her eyes fixed in appeal on Hanaud's face.

"Yes," replied Hanaud. "I follow your thought."

"I thought there was a chance now—the strangest chance—that the truth might be reached. I did not wish to spoil it," and she turned eagerly to Ricardo, as if, having persuaded Hanaud, she would now turn her batteries on his companion. "My whole point of view was changed. I was no longer afraid of falling asleep lest I should dream. I wished to dream, but———"

"But you could not," suggested Hanaud.

"No, that is the truth," replied Joan Carew. "Whereas before I was anxious to keep awake and yet must sleep from sheer fatigue, now that I tried consciously to put myself to sleep I remained awake all through the night, and only towards morning, when the light was coming through the blinds, dropped off into a heavy, dreamless slumber."

Hanaud nodded.

"It is a very perverse world, Miss Carew, and things go by contraries."

Ricardo listened for some note of irony in Hanaud's voice, some look of disbelief in his face. But there was neither the one nor the other. Hanaud was listening patiently.

"Then came my rehearsals," Joan Carew continued, "and that wonderful opera drove everything else out of my head. I had such a chance, if only I could make use of it! When I went to bed now, I went with that haunting music in my ears—the call of Paris—oh, you must remember it. But can you realise what it must mean to a girl who is going to sing it for the first time in Covent Garden?"

Mr. Ricardo saw his opportunity. He, the connoisseur, to whom the psychology of the green room was as an open book, could answer that question.

"It is true, my friend," he informed Hanaud with quiet authority. "The great march of events leaves the artist cold. He lives aloof. While the tumbrils thunder in the streets he adds a delicate tint to the picture he is engaged upon or recalls his triumph in his last great part."

"Thank you," said Hanaud gravely. "And now Miss Carew may perhaps resume her story."

"It was the very night of my début," she continued. "I had supper with some friends. A great artist, Carmen Valeri, honoured me with her presence. I went home excited, and that night I dreamed again."

"Yes?"

"This time the chin, the lips, the eyes were visible. There was only a black strip across the middle of the face. And I thought—nay, I was sure—that if that strip vanished I should know the man."

"And it did vanish?"

"Three nights afterwards."

"And you did know the man?"

The girl's face became troubled. She frowned.

"I knew the face, that was all," she answered. "I was disappointed. I had never spoken to the man. I am sure of that still. But somewhere I have seen him."

"You don't even remember when?" asked Hanaud.

"No." Joan Carew reflected for a moment with her eyes upon the carpet, and then flung up her head with a gesture of despair. "No. I try all the time to remember. But it is no good."

Mr. Ricardo could not restrain a movement of indignation. He was being played with. The girl with her fantastic story had worked him up to a real pitch of excitement only to make a fool of him. All his earlier suspicions flowed back into his mind. What if, after all, she was implicated in the murder and the theft? What if, with a perverse cunning, she had told Hanaud and himself just enough of what she knew, just enough of the truth, to persuade them to protect her? What if her frank confession of her own overpowering impulse to steal the necklace was nothing more than a subtle appeal to the sentimental pity of men, an appeal based upon a wider knowledge of men's weaknesses than a girl of nineteen or twenty ought to have? Mr. Ricardo cleared his throat and sat forward in his chair. He was girding himself for a singularly searching interrogatory when Hanaud asked the most irrelevant of questions:

"How did you pass the evening of that night when you first dreamed complete the face of your assailant?"

Joan Carew reflected. Then her face cleared.

"I know," she exclaimed. "I was at the opera."

"And what was being given?"

"The Jewels of the Madonna."

Hanaud nodded his head. To Ricardo it seemed that he had expected precisely that answer.

"Now," he continued, "you are sure that you have seen this man?"

"Yes."

"Very well," said Hanaud. "There is a game you play at children's parties—is there not?—animal, vegetable, or mineral, and always you get the answer. Let us play that game for a few minutes, you and I."

Joan Carew drew up her chair to the table and sat with her chin propped upon her hands and her eyes fixed on Hanaud's face. As he put each question she pondered on it and answered. If she answered doubtfully he pressed it.

"You crossed on the Lucania from New York?"

"Yes."

"Picture to yourself the dining-room, the tables. You have the picture quite clear?"

"Yes."

"Was it at breakfast that you saw him?"

"No."

"At luncheon?"

"No."

"At dinner?"

She paused for a moment, summoning before her eyes the travellers at the tables.

"No."

"Not in the dining-table at all, then?"

"No."

"In the library, when you were writing letters, did you not one day lift your head and see him?"

"No."

"On the promenade deck? Did he pass you when you sat in your deck-chair, or did you pass him when he sat in his chair?"

"No."

Step by step Hanaud took her back to New York to her hotel, to journeys in the train. Then he carried her to Milan where she had studied. It was extraordinary to Ricardo to realise how much Hanaud knew of the curriculum of a student aspiring to grand opera. From Milan he brought her again to New York, and at the last, with a start of joy, she cried: "Yes, it was there."

Hanaud took his handkerchief from his pocket and wiped his forehead.

"Ouf!" he grunted. "To concentrate the mind on a day like this, it makes one hot, I can tell you. Now, Miss Carew, let us hear."

It was at a concert at the house of a Mrs. Starlingshield in Fifth Avenue and in the afternoon. Joan Carew sang. She was a stranger to New York and very nervous. She saw nothing but a mist of faces whilst she sang, but when she had finished the mist cleared, and as she left the improvised stage she saw the man. He was standing against the wall in a line of men. There was no particular reason why her eyes should single him out, except that he was paying no attention to her singing, and, indeed, she forgot him altogether afterwards.

"I just happened to see him clearly and distinctly," she said. "He was tall, clean-shaven, rather dark, not particularly young—thirty-five or so, I should say—a man with a heavy face and beginning to grow stout. He moved away whilst I was bowing to the audience, and I noticed him afterwards walking about, talking to people."

"Do you remember to whom?"

"No."

"Did he notice you, do you think?"

"I am sure he didn't," the girl replied emphatically. "He never looked at the stage where I was singing, and he never looked towards me afterwards."

She gave, so far as she could remember, the names of such guests and singers as she knew at that party. "And that is all," she said.

"Thank you," said Hanaud. "It is perhaps a good deal. But it is perhaps nothing at all."

"You will let me hear from you?" she cried, as she rose to her feet.

"Miss Carew, I am at your service," he returned. She gave him her hand timidly and he took it cordially. For Mr. Ricardo she had merely a bow, a bow which recognised that he distrusted her and that she had no right to be offended. Then she went, and Hanaud smiled across the table at Ricardo.

"Yes," he said, "all that you are thinking is true enough. A man who slips out of society to indulge a passion for a drug in greater peace, a girl who, on her own confession, tried to steal, and, to crown all, this fantastic story. It is natural to disbelieve every word of it. But we disbelieved before, when we left Calladine's lodging in the Adelphi, and we were wrong. Let us be warned."

"You have an idea?" exclaimed Ricardo.

"Perhaps!" said Hanaud. And he looked down the theatre column of the Times. "Let us distract ourselves by going to the theatre."

"You are the most irritating man!" Mr. Ricardo broke out impulsively. "If I had to paint your portrait, I should paint you with your finger against the side of your nose, saying mysteriously: 'I know,' when you know nothing at all."

Hanaud made a schoolboy's grimace. "We will go and sit in your box at the opera to-night," he said, "and you shall explain to me all through the beautiful music the theory of the tonic sol-fa."

They reached Covent Garden before the curtain rose. Mr. Ricardo's box was on the lowest tier and next to the omnibus box.

"We are near the stage," said Hanaud, as he took his seat in the corner and so arranged the curtain that he could see and yet was hidden from view. "I like that."

The theatre was full; stalls and boxes shimmered with jewels and satin, and all that was famous that season for beauty and distinction had made its tryst there that night.

"Yes, this is wonderful," said Hanaud. "What opera do they play?" He glanced at his programme and cried, with a little start of surprise: "We are in luck. It is The Jewels of the Madonna."

"Do you believe in omens?" Mr. Ricardo asked coldly. He had not yet recovered from his rebuff of the afternoon.

"No, but I believe that Carmen Valeri is at her best in this part," said Hanaud.

Mr. Ricardo belonged to that body of critics which must needs spoil your enjoyment by comparisons and recollections of other great artists. He was at a disadvantage certainly to-night, for the opera was new. But he did his best. He imagined others in the part, and when the great scene came at the end of the second act, and Carmen Valeri, on obtaining from her lover the jewels stolen from the sacred image, gave such a display of passion as fairly enthralled that audience, Mr. Ricardo sighed quietly and patiently.

"How Calvé would have brought out the psychological value of that scene!" he murmured; and he was quite vexed with Hanaud, who sat with his opera glasses held to his eyes, and every sense apparently concentrated on the stage. The curtains rose and rose again when the act was concluded, and still Hanaud sat motionless as the Sphynx, staring through his glasses.

"That is all," said Ricardo when the curtains fell for the fifth time.

"They will come out," said Hanaud. "Wait!" And from between the curtains Carmen Valeri was led out into the full glare of the footlights with the panoply of jewels flashing on her breast. Then at last Hanaud put down his glasses and turned to Ricardo with a look of exultation and genuine delight upon his face which filled that season-worn dilettante with envy.

"What a night!" said Hanaud. "What a wonderful night!" And he applauded until he split his gloves. At the end of the opera he cried: "We will go and take supper at the Semiramis. Yes, my friend, we will finish our evening like gallant gentlemen. Come! Let us not think of the morning." And boisterously he slapped Ricardo in the small of the back.

In spite of his boast, however, Hanaud hardly touched his supper, and he played with, rather than drank, his brandy and soda. He had a little table to which he was accustomed beside a glass screen in the depths of the room, and he sat with his back to the wall watching the groups which poured in. Suddenly his face lighted up.

"Here is Carmen Valeri!" he cried. "Once more we are in luck. Is it not that she is beautiful?"

Mr. Ricardo turned languidly about in his chair and put up his eyeglass.

"So, so," he said.

"Ah!" returned Hanaud. "Then her companion will interest you still more. For he is the man who murdered Mrs. Blumenstein."

Mr. Ricardo jumped so that his eyeglass fell down and tinkled on its cord against the buttons of his waistcoat.

"What!" he exclaimed. "It's impossible!" He looked again. "Certainly the man fits Joan Carew's description. But—" He turned back to Hanaud utterly astounded. And as he looked at the Frenchman all his earlier recollections of him, of his swift deductions, of the subtle imagination which his heavy body so well concealed, crowded in upon Ricardo and convinced him.

"How long have you known?" he asked in a whisper of awe.

"Since ten o'clock to-night."

"But you will have to find the necklace before you can prove it."

"The necklace!" said Hanaud carelessly. "That is already found."

Mr. Ricardo had been longing for a thrill. He had it now. He felt it in his very spine.

"It's found?" he said in a startled whisper.

"Yes."

Ricardo turned again, with as much indifference as he could assume, towards the couple who were settling down at their table, the man with a surly indifference, Carmen Valeri with the radiance of a woman who has just achieved a triumph and is now free to enjoy the fruits of it. Confusedly, recollections returned to Ricardo of questions put that afternoon by Hanaud to Joan Carew—subtle questions into which the name of Carmen Valeri was continually entering. She was a woman of thirty, certainly beautiful, with a clear, pale face and eyes like the night.

"Then she is implicated too!" he said. What a change for her, he thought, from the stage of Covent Garden to the felon's cell, from the gay supper-room of the Semiramis, with its bright frocks and its babel of laughter, to the silence and the ignominious garb of the workrooms in Aylesbury Prison!

"She!" exclaimed Hanaud; and in his passion for the contrasts of drama Ricardo was almost disappointed. "She has nothing whatever to do with it. She knows nothing. André Favart there—yes. But Carmen Valeri! She's as stupid as an owl, and loves him beyond words. Do you want to know how stupid she is? You shall know. I asked Mr. Clements, the director of the opera house, to take supper with us, and here he is."

Hanaud stood up and shook hands with the director. He was of the world of business rather than of art, and long experience of the ways of tenors and prima-donnas had given him a good-humoured cynicism.

"They are spoilt children, all tantrums and vanity," he said, "and they would ruin you to keep a rival out of the theatre."

He told them anecdote upon anecdote.

"And Carmen Valeri," Hanaud asked in a pause; "is she troublesome this season?"

"Has been," replied Clements dryly. "At present she is playing at being good. But she gave me a turn some weeks ago." He turned to Ricardo. "Superstition's her trouble, and André Favart knows it. She left him behind in America this spring."

"America!" suddenly cried Ricardo; so suddenly that Clements looked at him in surprise.

"She was singing in New York, of course, during the winter," he returned. "Well, she left him behind, and I was shaking hands with myself when he began to deal the cards over there. She came to me in a panic. She had just had a cable. She couldn't sing on Friday night. There was a black knave next to the nine of diamonds. She wouldn't sing for worlds. And it was the first night of The Jewels of the Madonna! Imagine the fix I was in!"

"What did you do?" asked Ricardo.

"The only thing there was to do," replied Clements with a shrug of the shoulders. "I cabled Favart some money and he dealt the cards again. She came to me beaming. Oh, she had been so distressed to put me in the cart! But what could she do? Now there was a red queen next to the ace of hearts, so she could sing without a scruple so long, of course, as she didn't pass a funeral on the way down to the opera house. Luckily she didn't. But my money brought Favart over here, and now I'm living on a volcano. For he's the greatest scoundrel unhung. He never has a farthing, however much she gives him; he's a blackmailer, he's a swindler, he has no manners and no graces, he looks like a butcher and treats her as if she were dirt, he never goes near the opera except when she is singing in this part, and she worships the ground he walks on. Well, I suppose it's time to go."

The lights had been turned off, the great room was emptying. Mr. Ricardo and his friends rose to go, but at the door Hanaud detained Mr. Clements, and they talked together alone for some little while, greatly to Mr. Ricardo's annoyance. Hanaud's good humour, however, when he rejoined his friend, was enough for two.

"I apologise, my friend, with my hand on my heart. But it was for your sake that I stayed behind. You have a meretricious taste for melodrama which I deeply deplore, but which I mean to gratify. I ought to leave for Paris to-morrow, but I shall not. I shall stay until Thursday." And he skipped upon the pavement as they walked home to Grosvenor Square.

Mr. Ricardo bubbled with questions, but he knew his man. He would get no answer to any one of them to-night. So he worked out the problem for himself as he lay awake in his bed, and he came down to breakfast next morning fatigued but triumphant. Hanaud was already chipping off the top of his egg at the table.

"So I see you have found it all out, my friend," he said.

"Not all," replied Ricardo modestly, "and you will not mind, I am sure, if I follow the usual custom and wish you a good morning."

"Not at all," said Hanaud. "I am all for good manners myself."

He dipped his spoon into his egg.

"But I am longing to hear the line of your reasoning."

Mr. Ricardo did not need much pressing.

"Joan Carew saw André Favart at Mrs. Starlingshield's party, and saw him with Carmen Valeri. For Carmen Valeri was there. I remember that you asked Joan for the names of the artists who sang, and Carmen Valeri was amongst them."

Hanaud nodded his head.

"Exactly."

"No doubt Joan Carew noticed Carmen Valeri particularly, and so took unconsciously into her mind an impression of the man who was with her, André Favart—of his build, of his walk, of his type."

Again Hanaud agreed.

"She forgets the man altogether, but the picture remains latent in her mind—an undeveloped film."

Hanaud looked up in surprise, and the surprise flattered Mr. Ricardo. Not for nothing had he tossed about in his bed for the greater part of the night.

"Then came the tragic night at the Semiramis. She does not consciously recognise her assailant, but she dreams the scene again and again, and by a process of unconscious cerebration the figure of the man becomes familiar. Finally she makes her début, is entertained at supper afterwards, and meets once more Carmen Valeri."

"Yes, for the first time since Mrs. Starlingshield's party," interjected Hanaud.

"She dreams again, she remembers asleep more than she remembers when awake. The presence of Carmen Valeri at her supper-party has its effect. By a process of association, she recalls Favart, and the mask slips on the face of her assailant. Some days later she goes to the opera. She hears Carmen Valeri sing in The Jewels of the Madonna. No doubt the passion of her acting, which I am more prepared to acknowledge this morning than I was last night, affects Joan Carew powerfully, emotionally. She goes to bed with her head full of Carmen Valeri, and she dreams not of Carmen Valeri, but of the man who is unconsciously associated with Carmen Valeri in her thoughts. The mask vanishes altogether. She sees her assailant now, has his portrait limned in her mind, would know him if she met him in the street, though she does not know by what means she identified him,"

"Yes," said Hanaud. "It is curious the brain working while the body sleeps, the dream revealing what thought cannot recall."

Mr. Ricardo was delighted. He was taken seriously.

"But of course," he said, "I could not have worked the problem out but for you. You knew of André Favart and the kind of man he was."

Hanaud laughed.

"Yes. That is always my one little advantage. I know all the cosmopolitan blackguards of Europe." His laughter ceased suddenly, and he brought his clenched fist heavily down upon the table. "Here is one of them who will be very well out of the world, my friend," he said very quietly, but there was a look of force in his face and a hard light in his eyes which made Mr. Ricardo shiver.

For a few moments there was silence. Then Ricardo asked: "But have you evidence enough?"

"Yes."

"Your two chief witnesses, Calladine and Joan Carew—you said it yourself—there are facts to discredit them. Will they be believed?"

"But they won't appear in the case at all," Hanaud said. "Wait, wait!" and once more he smiled. "By the way, what is the number of Calladine's house?"

Ricardo gave it, and Hanaud therefore wrote a letter. "It is all for your sake, my friend," he said with a chuckle.

"Nonsense," said Ricardo. "You have the spirit of the theatre in your bones."

"Well, I shall not deny it," said Hanaud, and he sent out the letter to the nearest pillar-box.

Mr. Ricardo waited in a fever of impatience until Thursday came. At breakfast Hanaud would talk of nothing but the news of the day. At luncheon he was no better. The affair of the Semiramis Hotel seemed a thousand miles from any of his thoughts. But at five o'clock he said as he drank his tea:

"You know, of course, that we go to the opera to-night?"

"Yes. Do we?"

"Yes. Your young friend Calladine, by the way, will join us in your box."

"That is very kind of him, I am sure," said Mr. Ricardo.

The two men arrived before the rising of the curtain, and in the crowded lobby a stranger spoke a few words to Hanaud, but what he said Ricardo could not hear. They took their seats in the box, and Hanaud looked at his programme.

"Ah! It is Il Ballo de Maschera to-night. We always seem to hit upon something appropriate, don't we?"

Then he raised his eyebrows.

"Oh-o! Do you see that our pretty young friend, Joan Carew, is singing in the role of the page? It is a showy part. There is a particular melody with a long-sustained trill in it, as far as I remember."

Mr. Ricardo was not deceived by Hanaud's apparent ignorance of the opera to be given that night and of the part Joan Carew was to take. He was, therefore, not surprised when Hanaud added:

"By the way, I should let Calladine find it all out for himself."

Mr. Ricardo nodded sagely.

"Yes. That is wise. I had thought of it myself." But he had done nothing of the kind. He was only aware that the elaborate stage-management in which Hanaud delighted was working out to the desired climax, whatever that climax might be. Calladine entered the box a few minutes later and shook hands with them awkwardly.

"It was kind of you to invite me," he said and, very ill at ease, he took a seat between them and concentrated his attention on the house as it filled up.

"There's the overture," said Hanaud. The curtains divided and were festooned on either side of the stage. The singers came on in their turn; the page appeared to a burst of delicate applause (Joan Carew had made a small name for herself that season), and with a stifled cry Calladine shot back in the box as if he had been struck. Even then Mr. Ricardo did not understand. He only realised that Joan Carew was looking extraordinarily trim and smart in her boy's dress. He had to look from his programme to the stage and back again several times before the reason of Calladine's exclamation dawned on him. When it did, he was horrified. Hanaud, in his craving for dramatic effects, must have lost his head altogether. Joan Carew was wearing, from the ribbon in her hair to the scarlet heels of her buckled satin shoes, the same dress as she had worn on the tragic night at the Semiramis Hotel. He leaned forward in his agitation to Hanaud.

"You must be mad. Suppose Favart is in the theatre and sees her. He'll be over on the Continent by one in the morning."

"No, he won't," replied Hanaud. "For one thing, he never comes to Covent Garden unless one opera, with Carmen Valeri in the chief part, is being played, as you heard the other night at supper. For a second thing, he isn't in the house. I know where he is. He is gambling in Dean Street, Soho. For a third thing, my friend, he couldn't leave by the nine o'clock train for the Continent if he wanted to. Arrangements have been made. For a fourth thing, he wouldn't wish to. He has really remarkable reasons for desiring to stay in London. But he will come to the theatre later. Clements will send him an urgent message, with the result that he will go straight to Clements' office. Meanwhile, we can enjoy ourselves, eh?"

Never was the difference between the amateur dilettante and the genuine professional more clearly exhibited than by the behaviour of the two men during the rest of the performance. Mr. Ricardo might have been sitting on a coal fire from his jumps and twistings; Hanaud stolidly enjoyed the music, and when Joan Carew sang her famous solo his hands clamoured for an encore louder than anyone's in the boxes. Certainly, whether excitement was keeping her up or no, Joan Carew had never sung better in her life. Her voice was clear and fresh as a bird's—a bird with a soul inspiring its song. Even Calladine drew his chair forward again and sat with his eyes fixed upon the stage and quite carried out of himself. He drew a deep breath at the end.

"She is wonderful," he said, like a man waking up.

"She is very good," replied Mr. Ricardo, correcting Calladine's transports.

"We will go round to the back of the stage," said Hanaud.

They passed through the iron door and across the stage to a long corridor with a row of doors on one side. There were two or three men standing about in evening dress, as if waiting for friends in the dressing-rooms. At the third door Hanaud stopped and knocked. The door was opened by Joan Carew, still dressed in her green and gold. Her face was troubled, her eyes afraid.

"Courage, little one," said Hanaud, and he slipped past her into the room. "It is as well that my ugly, familiar face should not be seen too soon."

The door closed and one of the strangers loitered along the corridor and spoke to a call-boy. The call-boy ran off. For five minutes more Mr. Ricardo waited with a beating heart. He had the joy of a man in the centre of things. All those people driving homewards in their motor-cars along the Strand—how he pitied them! Then, at the end of the corridor, he saw Clements and André Favart. They approached, discussing the possibility of Carmen Valerias appearance in London opera during the next season.

"We have to look ahead, my dear friend," said Clements, "and though I should be extremely sorry———"

At that moment they were exactly opposite Joan Carew's door. It opened, she came out; with a nervous movement she shut the door behind her. At the sound André Favart turned, and he saw drawn up against the panels of the door, with a look of terror in her face, the same gay figure which had interrupted him in Mrs. Blumenstein's bedroom. There was no need for Joan to act. In the presence of this man her fear was as real as it had been on the night of the Semiramis ball. She trembled from head to foot. Her eyes closed; she seemed about to swoon.

Favart stared and uttered an oath. His face turned white; he staggered back as if he had seen a ghost. Then he made a wild dash along the corridor, and was seized and held by two of the men in evening dress. Favart recovered his wits. He ceased to struggle.

"What does this outrage mean?" he asked, and one of the men drew a warrant and notebook from his pocket.

"You are arrested for the murder of Mrs. Blumenstein in the Semiramis Hotel," he said, "and I have to warn you that anything you may say will be taken down and may be used in evidence against you."

"Preposterous!" exclaimed Favart. "There's a mistake. We will go along to the police and put it right. Where's your evidence against me?"

Hanaud stepped out of the doorway of the dressing-room.

"In the property-room of the theatre," he said.

At the sight of him Favart uttered a violent cry of rage. "You are here, too, are you?" he screamed, and he sprang at Hanaud's throat. Hanaud stepped lightly aside. Favart was borne down to the ground, and when he stood up again the handcuffs were on his wrists.

Favart was led away, and Hanaud turned to Mr. Ricardo and Clements.

"Let us go to the property-room," he said. They passed along the corridor, and Ricardo noticed that Calladine was no longer with them. He turned and saw him standing outside Joan Carew's dressing-room.

"He would like to come, of course," said Ricardo.

"Would he?" asked Hanaud. "Then why doesn't he? He's quite grown up, you know," and he slipped his arm through Ricardo's and led him back across the stage. In the property-room there was already a detective in plain clothes. Mr. Ricardo had still not as yet guessed the truth.

"What is it you really want, sir?" the property-master asked of the director.

"Only the jewels of the Madonna," Hanaud answered.

The property-master unlocked a cupboard and took from it the sparkling cuirass. Hanaud pointed to it, and there, lost amongst the huge glittering stones of paste and false pearls, Mrs. Blumenstein's necklace was entwined.

"Then that is why Favart came always to Covent Garden when The Jewels of the Madonna was being performed!" exclaimed Ricardo.

Hanaud nodded.

"He came to watch over his treasure."

Ricardo was piecing together the sections of the puzzle.

"No doubt he knew of the necklace in America. No doubt he followed it to England."

Hanaud agreed.

"Mrs. Blumenstein's jewels were quite famous in New York."

"But to hide them here!" cried Mr. Clements. "He must have been mad."

"Why?" asked Hanaud. "Can you imagine a safer hiding-place? Who is going to burgle the property-room of Covent Garden? Who is going to look for a priceless string of pearls amongst the stage jewels of an opera house?"

"You did," said Mr, Ricardo.

"I?" replied Hanaud, shrugging his shoulders. "Joan Carew's dreams led me to André Favart. The first time we came here and saw the pearls of the Madonna, I was on the look-out, naturally. I noticed Favart at the back of the stalls. But it was a stroke of luck that I noticed those pearls through my opera glasses."

"At the end of the second act?" cried Ricardo suddenly. "I remember now."

"Yes," replied Hanaud. "But for that second act the pearls would have stayed comofrtably here all through the season. Carmen Valeri—a fool as I told you—would have tossed them about in her dressing-room without a notion of their value, and at the end of July, when the murder at the Semiramis Hotel had been forgotten, Favart would have taken them to Amsterdam and made his bargain."

"Shall we go?"

They left the theatre together and walked down to the grill-room of the Semiramis. But as Hanaud looked through the glass door he drew back.

"We will not go in, I think, eh?"

"Why?" asked Ricardo.

Hanaud pointed to a table. Calladine and Joan Carew were seated at it taking their supper.

"Perhaps," said Hanaud with a smile, "perhaps, my friend—what? Who shall say that the rooms in the Adelphi will not be given up?"

They turned away from the hotel. But Hanaud was right, and before the season was over Mr. Ricardo had to put his hand in his pocket for a wedding present