lead to the surmise of self-murder. I calculated the exact angle at which it was probable that the weapon, if levelled by Simon’s own hand, would enter his breast; then with one powerful blow I thrust it up to the hilt in the very spot which I desired to penetrate. A convulsive thrill ran through Simon’s limbs. I heard a smothered sound issue from his throat, precisely like the bursting of a large air-bubble sent up by a diver when it reaches the surface of the water; he turned half round on his side, and, as if to assist my plans more effectually, his right hand, moved by some mere spasmodic impulse, clasped the handle of the creese, which it remained holding with extraordinary muscular tenacity. Beyond this there was no apparent struggle. The laudanum, I presume, paralyzed the usual nervous action. He must have died instantly.

There was yet something to be done. To make it certain that all suspicion of the act should be diverted from any inhabitant of the house to Simon himself, it was necessary that the door should be found in the morning locked on the inside. How to do this, and afterward escape myself? Not by the window; that was a physical impossibility. Besides, I was determined that the windows also should be found bolted. The solution was simple enough. I descended softly to my own room for a peculiar instrument which I had used for holding small slippery substances, such as minute spheres of glass, etc. This instrument was nothing more than a long, slender hand-vice, with a very powerful grip and a considerable leverage, which last was accidentally owing to the shape of the handle. Nothing was simpler than, when the key was in the lock to seize the end of its stem in this vice, through the keyhole, from the outside, and so lock the door. Previously, however, to doing this, I burned a number of papers on Simon’s hearth. Suicides almost always burn papers before they destroy themselves. I also emptied some more laudanum into Simon’s glass—having first removed from it all traces of wine—cleaned the other wine-glass, and brought the bottles away with me. If traces of two persons drinking had been found in the room, the question naturally would have arisen, Who was the second? Besides, the wine-bottles might have been identified as belonging to me. The laudanum I poured out to account for its presence in his stomach, in case of a post-mortem examination. The theory naturally would be that he first intended to poison himself, but, after swallowing a little of the drug, was either disgusted with its taste or changed his mind from other motives, and chose the dagger. These arrangements made, I walked out, leaving the gas burning, locked the door with my vice, and went to bed.

Simon’s death was not discovered until nearly three in the afternoon. The servant, astonished at seeing the gas burning—the light streaming on the dark landing from under the door—peeped through the keyhole and saw Simon on the bed. She gave the alarm. The door was burst open, and the neighbourhood was in a fever of excitement.

Every one in the house was arrested, myself included. There was an inquest; but no clue to his death beyond that of suicide could be obtained. Curiously enough, he had made several speeches to his friends the preceding week that seemed to point to self-destruction. One gentleman swore that Simon had said in his presence that “he was tired of life.” His landlord affirmed that Simon, when paying him his last month’s rent, remarked that “he should not pay him rent much longer.” All the other evidence corresponded—the door locked inside, the position of the corpse, the burned papers. As I anticipated, no one knew of the possession of the diamond by Simon, so that no motive was suggested for his murder. The jury, after a prolonged examination, brought in the usual verdict, and the neighbourhood once more settled down to its accustomed quiet.

V

The three months succeeding Simon’s catastrophe I devoted night and day to my diamond lens. I had constructed a vast galvanic battery, composed of nearly two thousand pairs of plates: a higher power I dared not use lest the diamond should be calcined. By means of this enormous engine I was enabled to send a powerful current of electricity continually through my great diamond, which it seemed to me gained in lustre every day. At the expiration of a month I commenced the grinding and polishing of the lens, a work of intense toil and exquisite delicacy. The great density of the stone, and the care required