steadily. I had put in a fortnight's attendance at a gymnasium under the supervision of Professor Schneipp, the Bavarian Hercules; I had practiced the most approved 'knock-outs' known to my instructor, the famous pugilist, Melchizedeck Cohen (popularly known as 'Slimy' Cohen); I had given up an hour a day to studying the management of the concussor with the aid of a punching-ball; the alarms were ready for fixing, and I even had the address of an undoubtedly disreputable housemaid, when a most unexpected thing happened. I got a premature bite. A fellow actually walked into the trap without troubling me to set it.

"It befell thus. I had gone to bed rather early and fallen asleep at once, but about one o'clock I awoke with that unmistakable completeness that heralds a sleepless night. I lit my candle-lamp and looked round for the book that I had been reading in the evening, and then I remembered that I had left it in the museum. Now that book had interested me deeply. It contained the only lucid description that I had met with of the Mundurucú Indians and their curious method of preserving the severed heads of their enemies; a method by which the head—after removal of the bones—was shrunk until it was no larger than a man's fist.

"I got up, and, taking my lamp and keys, made my way to the museum wing of the house, which opened out of the dining-room. I found the book, but, instead of returning immediately, lingered in the museum, looking about the great room and at the unfinished collection and gloomily recalling its associations. The museum was a gift from my wife. She had built it and the big laboratory soon after we were married and many a delightful hour we had spent in it together, arranging the new specimens in the cases. I did not allow her to work in the evil-smelling laboratory, but she had a collection of her own, of land and fresh-water shells (which were cleaner to handle than the bones); and I was pulling out some of the drawers in her cabinet, and, as I looked over the shells, thinking of the happy days when we rambled by the riverside or over furzy commons in search of them, when I became aware of faint sounds of movement from the direction of the dining-room.

"I stepped lightly down the corridor that led to the dining-room and listened. The door of communication was shut, but through it I could distinctly hear someone moving about and could occasionally detect the chink of metal. I ran back to the museum—my felt-soled bedroom slippers made no sound—and, taking the 'concussor' from the drawer in which I had concealed it, thrust it through the waist-band of my pajamas. Then I crept back to the door.

"The sounds had now ceased. I inferred that the burglar—for he could be none other—had gone to the pantry, where the plate-chest was kept. On this I turned the Yale latch and softly opened the door. It is my habit to keep all locks and hinges thoroughly oiled, and consequently the door opened without a sound. There was no one in the dining-room; but one burner of the gas was alight and various articles of silver plate were laid on the table, just as they had been when my wife was murdered. I drew the museum door to—I could not shut it because of the noise the spring latch would have made—and slipped behind a Japanese screen that stood near the dining-room door. I had just taken my place when a stealthy footstep approached along the hall. It entered the room and then there was a faint clink of metal. I peeped cautiously round the screen and looked on the back of a man who was standing by the table on which he was noiselessly depositing a number of spoons and forks and a candlestick. Although his back was towards me, a mirror on the opposite wall gave me a good view of his face; a wooden, expressionless face, such as I have since learned to associate with the English habitual criminal; the penal servitude face, in fact.

"He was a careful operator. He turned over each piece thoroughly, weighing it in his hand and giving especial attention to the hall-mark. And, as I watched him, the thought came into my mind that, perchance, this was the very wretch who had murdered my wife, come back for the spoil that he had then had to abandon. It was quite possible, even likely, and at the thought I felt my cheeks flush and a strange, fierce pleasure, such as I had never felt before, swept into my consciousness. I could have laughed aloud, but I did not. Also, I could have knocked him down with perfect ease as he stood, but I did not. Why did I not? Was it a vague, sporting sense of fairness? Or was it a catlike instinct impelling me to play with my quarry? I cannot say. Only I know that the idea of dealing him a blow from behind did not attract me.

"Presently he shuffled away (in list slippers) to fetch a fresh cargo. Then some ferociously playful impulse led me to steal out of my hiding-place and gather up a number of spoons and forks, a salt-cellar, a candlestick and an entree-dish and retire again behind the screen. Then my friend returned with a fresh consignment; and as he was anxiously looking over the fresh pieces, I crept silently out at the other end of the screen, out of the open doorway and down the hall to the pantry. Here a lighted candle showed the plate-chest open and half empty, with a few pieces of plate on a side table. Quickly but silently I replaced in the chest the spoons and other pieces that I had collected, and then stole back to my place behind the screen and resumed my observations.

"My guest was quite absorbed in his task. He had a habit—common, I believe, among 'old lags'—of talking to himself; and very poor stuff his conversation was, though it was better than his arithmetic, as I gathered from his attempts to compute the weight of the booty. Anon, he retired for another consignment, and once more I came out and gathered up a little selection from his stock; and when he returned laden with spoil, I went off, as before, and put the articles back in the plate-chest.

"These manoeuvres were repeated a quite incredible number of times. The man must have been an abject blockhead, as I believe most professional criminals are. His lack of observation was astounding. It is true that he began to be surprised and rather bewildered. He even noted that 'there seemed a bloomin' lot of 'em;' and the quality of his arithmetical feats and his verbal enrichments became, alike, increasingly lurid. I believe he would have gone on until daylight if I had not tried him too often with a Queen Anne teapot. It was that teapot, with its conspicuous urn design, that finally disillusioned him. I had just returned from putting it back in the chest for the third time when he missed it; and he announced the discovery with a profusion of perfectly unnecessary and highly inappropriate adjectives.

"'Naa, then!' he exclaimed truculently, 'where's that blimy teapot gone to? Hay? I put that there teapot down inside that there hontry-dish—and where's the bloomin' hontry? Bust me if that ain't gone to!'

"He stood by the table scratching his bristly head and looking the picture of ludicrous bewilderment. I watched him and meanwhile debated whether or not I should take the opportunity to knock him down. That was undoubtedly the proper course. But I could not bring myself to do it. A spirit of wild mischief possessed me; a strange, unnatural buoyancy and fierce playfulness that impelled me to play insane, fantastic tricks. It was a singular phenomenon. I seemed suddenly to have made the acquaintance of a hitherto unknown moiety of a dual personality.

"The burglar stood awhile, muttering idiotically, and then shuffled off to the pantry. I followed him out into the dark hall and, taking my stand behind a curtain, awaited his return. He came back presently, and, by the glimmer of light from the open door, I could see that he had the teapot and the 'hontry.' Now some previous tenant had fitted the dining-room door with two external bolts; I cannot imagine why; but the present circumstances suggested a use for them. As soon as the burglar was inside, I crept