"What is that noise?"

I lay in bed in that curious condition which is between sleep and waking. When, at last, I knew that I was awake, I asked myself what it was that had woke me. Suddenly I became conscious that something was making itself audible in the silence of the night. For some seconds I lay and listened. Then I sat up in bed.

"What is that noise?"

It was like the tick, tick of some large and unusually clear-toned clock. It might have been a clock, had it not been that the sound was varied, every half dozen ticks or so, by a sort of stifled screech, such as might have been uttered by some small creature in an extremity of anguish. I got out of bed; it was ridiculous to think of sleep during the continuation of that uncanny shrieking. I struck a light. The sound seemed to come from the neighborhood of my dressing-table. I went to the dressing-table, the lighted match in my hand, and, as I did so, my eyes fell on Pugh's mysterious box. That same instant there issued, from the bowels of the box, a more uncomfortable screech than any I had previously heard. It took me so completely by surprise that I let the match fall from my hand to the floor. The room was in darkness. I stood, I will not say trembling, listening—considering their volume—to the eeriest shrieks I ever heard. All at once they ceased. Then came the tick, tick, tick again. I struck another match and lit the gas.

Pugh had left his puzzle box behind him. We had done all we could, together, to solve the puzzle. He had left it behind to see what I could do with it alone. So much had it engrossed my attention that I had even brought it into my bedroom, in order that I might, before retiring to rest, make a final attempt at the solution of the mystery. Now what possessed the thing?

As I stood, and looked, and listened, one thing began to be clear to me, that some sort of machinery had been set in motion inside the box. How it had been set in motion was another matter. But the box had been subjected to so much handling, to such pressing and such hammering, that it was not strange if, after all, Pugh or I had unconsciously hit upon the spring which set the whole thing going. Possibly the mechanism had got so rusty that it had refused to act at once. It had hung fire, and only after some hours had something or other set the imprisoned motive power free.

But what about the screeching? Could there be some living creature concealed within the box? Was I listening to the cries of some small animal in agony? Momentary reflection suggested that the explanation of the one thing was the explanation of the other. Rust!—there was the mystery. The same rust which had prevented the mechanism from acting at once was causing the screeching now. The uncanny sounds were caused by nothing more nor less than the want of a drop or two of oil. Such an explanation would not have satisfied Pugh, it satisfied me.

Picking up the box, I placed it to my ear.

"I wonder how long this little performance is going to continue. And what is going to happen when it is good enough to cease? I hope"—an uncomfortable thought occurred to me—"I hope Pugh hasn't picked up some pleasant little novelty in the way of an infernal machine. It would be a first-rate joke if he and I had been endeavoring to solve the puzzle of how to set it going."

I don't mind owning that as this reflection crossed my mind I replaced Pugh's puzzle on the dressing-table. The idea did not commend itself to me at all. The box evidently contained some curious mechanism. It might be more curious than comfortable. Possibly some agreeable little device in clockwork. The tick, tick, tick suggested clockwork which had been planned to go a certain time, and then—then, for all I knew, ignite an explosive, and—blow up. It would be a charming solution to the puzzle if it were to explode while I stood there, in my nightshirt, looking on. It is true that the box weighed very little. Probably, as I have said, the whole affair would not have turned the scale at a couple of ounces. But then its very lightness might have been part of the ingenious inventor's little game. There are explosives with which one can work a very satisfactory amount of damage with considerably less than a couple of ounces.

While I was hesitating—I own it!—whether I had not better immerse Pugh's puzzle in a can of water, or throw it out of the window, or call down Bob with a request to at once remove it to his apartment, both the tick, tick, tick, and the screeching ceased, and all within the box was still. If it was going to explode, it was now or never. Instinctively I moved in the direction of the door.

I waited with a certain sense of anxiety. I waited in vain. Nothing happened, not even a renewal of the sound.

"I wish Pugh had kept his precious puzzle at home. This sort of thing tries one's nerves."

When I thought that I perceived that nothing seemed likely to happen, I returned to the neighborhood of the table. I looked at the box askance. I took it up gingerly. Something might go off at any moment for all I knew. It would be too much of a joke if Pugh's precious puzzle exploded in my hand. I shook it doubtfully; nothing rattled. I held it to my ear. There was not a sound. What had taken place? Had the clockwork run down, and was the machine arranged with such a diabolical ingenuity that a certain, interval was required, after the clockwork had run down, before an explosion could occur? Or had rust caused the mechanism to again hang fire?

"After making all that commotion the thing might at least come open." I banged the box viciously against the corner of the table. I felt that I would almost rather that an explosion should take place than that nothing should occur. One does not care to be disturbed from one's sound slumber in the small hours of the morning for a trifle.

"I've half a mind to get a hammer, and try, as they say in the cookery books, another way."

Unfortunately I had promised Pugh to abstain from using force. I might have shivered the box open with my hammer, and then explained that it had fallen, or got trod upon, or sat upon, or something, and so got shattered, only I was afraid that Pugh would not believe me. The man is himself such an untruthful man that he is in a chronic state of suspicion about the truthfulness of others.

"Well, if you're not going to blow up, or open, or something, I'll say good night."

I gave the box a final rap with my knuckles and a final shake, replaced it on the table, put out the gas, and returned to bed.

I was just sinking again into slumber, when that box began again. It was true that Pugh had purchased the puzzle, but it was evident that the whole enjoyment of the purchase was destined to be mine. It was useless to think of sleep while that performance was going on. I sat up in bed once more.

"It strikes me that the puzzle consists in finding out how it is possible to go to sleep with Pugh's purchase in your bedroom. This is far better than the old-fashioned prescription of cats on the tiles."

It struck me the noise was distinctly louder than before; this applied both to the tick, tick, tick, and the screeching.

"Possibly," I told myself, as I relighted the gas, "the explosion is to come off this time."

I turned to look at the box. There could be no doubt about it; the noise was louder. And, if I could trust my eyes, the box was moving—giving a series of little jumps. This might have been an optical delusion, but it seemed to me that at each tick the box gave a little bound. During the screeches—which sounded more like the cries of an animal in an agony of pain even than before—if it did not tilt itself first on one end, and then on another, I shall never be willing to trust the evidence of my own eyes again. And surely the box had increased in size; I could have sworn not only that it had increased, but that it was increasing, even as I stood there looking on. It had grown, and still was growing, both broader, and longer, and deeper. Pugh, of course, would have attributed it to supernatural agency; there never was a man with such a nose for a ghost. I could picture him occupying my position, shivering in his nightshirt, as he beheld that miracle taking place before his eyes. The solution which at once suggested itself to me—and which would never have suggested itself to Pugh!—was that the box was fashioned, as it were, in layers, and that the ingenious mechanism it contained was forcing the sides at once both upward and outward. I took it in my hand. I could feel something striking against the bottom of the box, like the tap, tap, tapping of a tiny hammer.

"This is a pretty puzzle of Pugh's. He would say that that is the tapping of a deathwatch. For my part I have not much faith in deathwatches, et hoc genus omne, but it certainly is a curious tapping; I wonder what is going to happen next?"

Apparently nothing, except a continuation of those mysterious sounds. That the box had increased in size I had, and have, no doubt whatever. I should say that it had increased a good inch in every direction, at least half an inch while I had been looking on. But while I stood looking its growth was suddenly and perceptibly stayed; it ceased to move. Only the noise continued.

"I wonder how long it will be before anything worth happening does happen! I suppose something is going to happen; there can't be all this to-do for nothing. If it is anything in the infernal machine line, and there is going to be an explosion, I might as well be here to see it. I think I'll have a pipe."

I put on my dressing-gown. I lit my pipe. I sat and stared at the box. I dare say I sat there for quite twenty minutes when, as before, without any sort of warning, the sound was stilled. Its sudden cessation rather startled me.

"Has the mechanism again hung fire? Or, this time, is the explosion coming off?" It did not come off; nothing came off. "Isn't the box even going to open?"

It did not open. There was simply silence all at once, and that was all. I sat there in expectation for some moments longer. But I sat for nothing. I rose. I took the box in my hand. I shook it.

"This puzzle is a puzzle." I held the box first to one ear, then to the other. I gave it several sharp raps with my knuckles. There was not an answering sound, not even the sort of reverberation which Pugh and I had noticed at first. It seemed hollower than ever. It was as though the soul of the box was dead. "I suppose if I put you down, and extinguish the gas and return to bed, in about half an hour or so, just as I am dropping off to sleep, the performance will be recommenced. Perhaps the third time will be lucky."

But I was mistaken—there was no third time. When I returned to bed that time I returned to sleep, and I was allowed to sleep; there was no continuation of the performance, at least so far as I know. For no sooner was I once more between the sheets than I was seized with an irresistible drowsiness, a drowsiness which so mastered me that I—I imagine it must have been instantly—sank into slumber which lasted till long after day had dawned. Whether or not any more mysterious sounds issued from the bowels of Pugh's puzzle is more than I can tell. If they did, they did not succeed in rousing me.

And yet, when at last I did awake, I had a sort of consciousness that my waking had been caused by something strange. What it was I could not surmise. My own impression was that I had been awakened by the touch of a person's hand. But that impression must have been a mistaken one, because, as I could easily see by looking round the room, there was no one in the room to touch me.

It was broad daylight. I looked at my watch; it was nearly eleven o'clock. I am a pretty late sleeper as a rule, but I do not usually sleep as late as that. That scoundrel Bob would let me sleep all day without thinking it necessary to call me. I was just about to spring out of bed with the intention of ringing the bell so that I might give Bob a piece of my mind for allowing me to sleep so late, when my glance fell on the dressing-table on which, the night before, I had placed Pugh's puzzle. It had gone!

Its absence so took me by surprise that I ran to the table. It had gone. But it had not gone far; it had gone to pieces! There were the pieces lying where the box had been. The puzzle had solved itself. The box was open, open with a vengeance, one might say. Like that unfortunate Humpty Dumpty, who, so the chroniclers tell us, sat on a wall, surely "all the king's horses and all the king's men" never could put Pugh's puzzle together again!

The marquetry had resolved itself into its component parts. How those parts had ever been joined was a mystery. They had been laid upon no foundation, as is the case with ordinary inlaid work. The several pieces of wood were not only of different shapes and sizes, but they were as thin as the thinnest veneer; yet the box had been formed by simply joining them together. The man who made that box must have been possessed of ingenuity worthy of a better cause.

I perceived how the puzzle had been worked. The box had contained an arrangement of springs, which, on being released, had expanded themselves in different directions until their mere expansion had rent the box to pieces. There were the springs, lying amid the ruin they had caused.

There was something else amid that ruin besides those springs; there was a small piece of writing paper. I took it up. On the reverse side of it was written in a minute, crabbed hand: "A Present For You." What was a present for me? I looked, and, not for the first time since I had caught sight of Pugh's precious puzzle, could scarcely believe my eyes.

There, poised between two upright wires, the bent ends of which held it aloft in the air, was either a piece of glass or—a crystal. The scrap of writing paper had exactly covered it. I understood what it was, when Pugh and I had tapped with the hammer, had caused the answering taps to proceed from within. Our taps caused the wires to oscillate, and in these oscillations the crystal, which they held suspended, had touched the side of the box.

I looked again at the piece of paper. "A Present For You." Was this the present—this crystal? I regarded it intently.

"It can't be a diamond."

The idea was ridiculous, absurd. No man in his senses would place a diamond inside a twopenny-halfpenny puzzle box. The thing was as big as a walnut! And yet—I am a pretty good judge of precious stones—if it was not an uncut diamond it was the best imitation I had seen. I took it up. I examined it closely. The more closely I examined it, the more my wonder grew.

"It is a diamond!"

And yet the idea was too preposterous for credence. Who would present a diamond as big as a walnut with a trumpery puzzle? Besides, all the diamonds which the world contains of that size are almost as well known as the Koh-i-noor.

"If it is a diamond, it is worth—it is worth—Heaven only knows what it isn't worth if it's a diamond."

I regarded it through a strong pocket lens. As I did so I could not restrain an exclamation.

"The world to a China orange, it is a diamond!"

The words had scarcely escaped my lips than there came a tapping at the door.

"Come in!" I cried, supposing it was Bob. It was not Bob, it was Pugh. Instinctively I put the lens and the crystal behind my back. At sight of me in my nightshirt Pugh began to shake his head.

"What hours, Tress, what hours! Why, my dear Tress, I've breakfasted, read the papers and my letters, came all the way from my house here, and you're not up!"

"Don't I look as though I were up?"

"Ah, Tress! Tress!" He approached the dressing-table. His eye fell upon the ruins. "What's this?"

"That's the solution to the puzzle."

"Have you—have you solved it fairly, Tress?"

"It has solved itself. Our handling, and tapping, and hammering must have freed the springs which the box contained, and during the night, while I slept, they have caused it to come open."

"While you slept? Dear me! How strange! And—what are these?"

He had discovered the two upright wires on which the crystal had been poised.

"I suppose they're part of the puzzle."

"And was there anything in the box? What's this?" He picked up the scrap of paper; I had left it on the table. He read what was written on it: "'A Present For You.' What's it mean? Tress, was this in the box?"

"It was."

"What's it mean about a present? Was there anything in the box besides?"

"Pugh, if you will leave the room I shall be able to dress; I am not in the habit of receiving quite such early calls, or I should have been prepared to receive you. If you will wait in the next room, I will be with you as soon as I'm dressed. There is a little subject in connection with the box which I wish to discuss with you."

"A subject in connection with the box? What is the subject?"

"I will tell you, Pugh, when I have performed my toilet."