"Then I must ask you to give me carte blanche in this matter."
"Oh, certainly."
"And in order to facilitate my plans it would be as well to make a confidante of Mrs. Odell. The rest you must leave to me."
"What do you think the chances are of discovering the thief?" he asked, with a dubious expression.
"I shall discover him," I answered emphatically. Whereupon the Colonel looked more than surprised, and proceeded to rattle off a string of questions with the object of learning why I spoke so decisively. But I was compelled to tell him that I could give him no reason, for though I had worked out a theory which intuitively I believed to be right, I had not at that moment a shred of acceptable proof in support of my theory, and that therefore I could not commit myself to raising suspicions against anyone until I was prepared to do something more than justify them.
He seemed rather disappointed, although he admitted the soundness of my argument.
"By the way, Colonel," I said, as I was about to take my departure, after having had a talk with his wife, "does it so happen that there is anything the matter with the roof of your house?"
"Not that I am aware of," he answered, opening his eyes wide with amazement at what no doubt seemed to him an absurd question. "Why do you ask?"
"Because I want to go on the roof without attracting the attention of anyone."
"Let us go at once, then," he said eagerly.
"No, not now. But I see that the greater part of the roof is flat, and leaded. Now, in the course of two or three days I shall present myself here in the guise of a plumber, and I shall be obliged by your giving orders that I am to be allowed to ascend to the roof without let or hindrance, as the lawyers say."
"Oh, certainly I will; but it seems to me an extraordinary proceeding," he exclaimed. I told him that many things necessarily seemed extraordinary when the reasons for them were not understood, and with that remark I took my departure, having promised the Colonel to do everything mortal man could do to recover the lost skull.
Three days later I went down to the Manor disguised as a working plumber, and was admitted without any difficulty, as the Colonel had left word that a man was coming down from London to examine the roof. As a servant was showing me upstairs to the top landing, where a trap-door in the ceiling gave access to the leads, I passed Ronald Odell on the stairs. He was attired in a long dressing-gown, had Turkish slippers on his feet, a fez on his head, and a cigar in his mouth, from which he was puffing great volumes of smoke. His face was almost ghastly in its pallor, and his eyes had the same dreamy look which I had noticed on my first visit. His hands were thrust deep in his pockets, and his movements and manner were suggestive of a person walking in his sleep, rather than a waking conscious man. This suggestion was heightened by the fact that before I could avoid him he ran full butt against me. That, however, seemed to partially arouse him from his lethargic condition, and turning round, with a fierceness of expression that I scarcely deemed him capable of, he exclaimed—
"You stupid fool, why don't you look where you are going to?"
I muttered out an apology, and he strode down the stairs growling to himself.
"Who is that?" I asked of the servant.
"That's the master's eldest son."
"He is a queer-looking fellow."
"I should think he was," answered the girl with a sniggering laugh. "I should say he has a slate off."
"Well, upon my word I should be inclined to agree with you,' I remarked.
"What does he do?"
"Nothing but smoke the greater part of the day."
"Does he follow no business or profession?"
"Not that I know of; though he generally goes out between six and seven in the evening, and does not come back till late."
"Where does he go to?"
"Oh, I don't know. He doesn't tell us servants his affairs. But there's something very queer about him. I don't like his looks at all."
"Doesn't his father exercise any control over him?"
"Not a bit of it. Why, his father dotes on him, and would try and get the moon for him if he wanted it."
"And what about his mother?"
"Well, her favourite is young Master Tom. He's a nice lad, now, as different again to his brother. In fact, I think the missus is afraid of Mr. Ronald. He doesn't treat his mother at all well. And now that the Colonel has gone away we shall all
