"Tress, I have brought you something on which you may exercise your ingenuity." He began, with exasperating deliberation, to untie the string which bound his parcel; he is one of those persons who would not cut a knot to save their lives. The process occupied him the better part of a quarter of an hour. Then he held out the contents of the paper. "What do you think of that?" he asked. I thought nothing of it, and I told him so. "I was prepared for that confession. I have noticed, Tress, that you generally do think nothing of an article which really deserves the attention of a truly thoughtful mind. Possibly, as you think so little of it, you will be able to solve the puzzle." I took what he held out to me. It was an oblong box, perhaps seven inches long by three inches broad. "Where's the puzzle?" I asked. "If you will examine the lid of the box, you will see." I turned it over and over; it was difficult to see which was the lid. Then I perceived that on one side were printed these words: "PUZZLE: TO OPEN THE BOX" The words were so faintly printed that it was not surprising that I had not noticed them at first. Pugh explained. "I observed that box on a tray outside a second-hand furniture shop. It struck my eye. I took it up. I examined it. I inquired of the proprietor of the shop in what the puzzle lay. He replied that that was more than he could tell me. He himself had made several attempts to open the box, and all of them had failed. I purchased it. I took it home. I have tried, and I have failed. I am aware, Tress, of how you pride yourself upon your ingenuity. I cannot doubt that, if you try, you will not fail." While Pugh was prosing, I was examining the box. It was at least well made. It weighed certainly under two ounces. I struck it with my knuckles; it sounded hollow. There was no hinge; nothing of any kind to show that it ever had been opened, or, for the matter of that, that it ever could be opened. The more I examined the thing, the more it whetted my curiosity. That it could be opened, and in some ingenious manner, I made no doubt--but how? The box was not a new one. At a rough guess I should say that it had been a box for a good half century; there were certain signs of age about it which could not escape a practiced eye. Had it remained unopened all that time? When opened, what would be found inside? It _sounded_ hollow; probably nothing at all--who could tell?