“Professor Van Allister turned to us with an air of supreme satisfaction. His face radiated ghoulish glee and his eyes were alight with a weird, insane gleam. When he spoke, his voice look on a tone of mastery.
“‘Bruce—and you, too, Miss Purdy—it has been your privilege to witness the first successful trial of a preparation that will revolutionize the world. It will instantaneously reduce to a fine ash anything with which it comes in contact, except glass! Just think what that means. An army equipped wih glass bombs filled with my compound could annihilate the world! Wood, metal, stone, brick—everything—swept away before them; leaving no more trace than the rabbit I have just experimented upon—just a pile of soft, white ashes!’
“I glanced at Miss Purdy. Her face had gone as white as the apron she wore.
“We watched Van Allister as he transferred all that was left of the bunny to a small bottle, and neatly labeled it. I’ll admit that I was suffering a mental chill myself by the time he dismissed us, and we left him alone behind the tightly closed doors of his workshop.
“Once safely outside, Miss Purdy’s nerves gave way completely. She reeled, and would have fallen had I not caught her in my arms.
“The feel of her soft, yielding body held close to my own was the last straw. I cast prudence to the winds and crushed her tightly to my breast. Kiss after kiss I pressed upon her full red lips, until her eyes opened and I saw the lovelight reflected in them.
“After a delicious eternity we came back to earth again—long enough to realize that the laboratory was no place for such ardent demonstrations. At any moment Van Allister might come out of his retreat, and if he should discover our love-making—in his present state of mind—we dared not think of what might happen.
“For the rest of the day I was like a man in a dream. It’s a wonder to me that I succeeded in accomplishing anything at all. My body was merely an automaton, a well-trained machine, going about its appointed tasks, while my mind soared into far away realms of delightful day-dreaming.
“Marjorie kept busy with her secretarial work for the rest of the day, and not once did I lay eyes upon her until my tasks in the laboratory were completed.
“That night we gave over to the joys of our new-found happiness. Prague, I shall remember that night as long as I live! The happiest moment I have ever known was when Marjorie Purdy promised to become my wife.”
“Yesterday was another day of unalloyed bliss. All day long my sweetheart and I worked side by side. Then followed another night of love-making. If you’ve never been in love with the only girl in the world, Prague, you can’t understand the delirious joy that comes from the very thought of her! And Marjorie returned my devotion a hundred-fold. She gave herself unreservedly into my keeping.
“Along about noontime, today, I needed something to complete an experiment, and I stepped over to the drug store for it.
‘When I returned I missed Marjorie. I looked for her hat and coat, and they were gone. The Professor had not shown himself since the experiment upon the rabbit, and was locked in his workshop.
“I asked the servants, but none of them had seen her leave the house, nor had she left any message for me.
“As the afternoon wore on I grew frantic. Evening came, and still no sign of my dear litle girl.
“All thought of work was forgotten. I paced the floor of my room like a caged lion. Every jangle of the ’phone or ring at the door bolstered up my faltering hopes of some word from her, but each time I was doomed to disappointment. Each minute seemed an hour; each hour an eternity!
“Good God, Prague! You can’t imagine how I suffered! From the heights of sublime love I mentally plunged to the darkest depths of despair. I conjured visions of all sorts of terrible fates overtaking her. Still, not a word did I hear.
“It seemed to me that I had lived a lifetime, but my watch told me it was only half-past seven when the butler told me that Van Allister wanted me in the laboratory.
“I was in no mood for experiments, but while I was under his roof he was my master, and it was for me to obey.
“The Professor was in his workshop, the door slightly ajar. He called to me to close the door of the laboratory and join him in the little room.
“In my state of mind my brain photographed every minute detail of the scene which met my eyes. In the center of the room, on a marble-top table, was a glass case about the shape and size of a coffin. It was filled almost to the brim with that same colorless liquid which the small bottle had contained, two days before.
“At the left, on a glass-top tabourette, was a newly-labeled glass jar. I could not repress an involuntary shudder as I realized that it was filled with soft, white ashes. Then I saw something that almost made my heart stop beating!
“On a chair, in a far corner of the workshop, was the hat and coat of the girl who had pledged her life to mine—the girl whom I had vowed to cherish and protect while life should last!
“My senses were numbed, my soul surcharged with horror, as realization flashed over me. There could be but one explanation. The ashes in that jar were the ashes of Marjorie Purdy!’’
“The world stood still for one long, terrible moment, and then I went mad—stark, staring mad!
“The next I can remember, the Professor and I were locked in a desperate struggle. Old as he was, he still possessed a strength nearly equal to mine, and he had the added advantage of calm self-possession.
“Closer and closer he forced me to the glass coffin. A few moments, more and my ashes would join those of the girl I had loved. I stumbled against the tabourette, and my fingers closed over the jar of ashes. With one, last, superhuman effort, I raised it high above my head, and brought it down with crushing force upon the skull of my antagonist! His arm relaxed, his limp form dropped in a senseless heap to the floor.
“Still acting upon impulse, I raised the silent form of the Professor and carefully, lest I should spill some of it on the floor, lowered the body into the casket of death!
“A moment, and it was over. Professor and liquid, both, were gone, and in their place was a little pile of soft, white ashes!
“As I gazed at my handiwork the brainstorm passed away, and I came face to face with the cold, hard truth that I had killed a fellow-being. An unnatural calm possessed me. I knew that there was not one single shred of evidence against me, barring the fact that I was the last one known to be alone with the Professor. Nothing remained but ashes!
“T put on my hat and coat, told the butler that the Professor had left word he was not to be disturbed, and that I was going out for the evening. Once outside, all my self-possession vanished. My nerves were shot to pieces. I don’t know where I went—only that I wandered aimlessly, here and there, until I found myself outside your apartment, just a little while ago.
“Prague, I felt as if I must talk with someone; that I must unburden my tortured mind. I knew that I could trust you, old pal, so I’ve told you the whole
