When Mr. Bryce and several workmen came running back with William Cunningham, they were as much surprised as he had been, and could form no theory to account for the disappearance of the car. It could not have slipped down accidentally and descended by its own weight, for the trap-door was open and the grating was in place. They sent in great haste for Mr. Clewe, and when he arrived he wasted no time in conjectures, but instantly ordered that the engine which was attached to the car should be started and its chain wound up. So great was the anxiety to get the car to the surface of the earth that the engine which raised it was run at as high a speed as was deemed safe, and in a little more than an hour the car came out of the mouth of the shaft, and in it sat Ivan Rovinski, motionless and dead. No one who knew Rovinski wondered that he had had the courage to make the descent of the shaft, and those who were acquainted with his great mechanical ability were not surprised that he had been able to manage, by himself, the complicated machinery which would ordinarily require the service of several men; but every one who saw him in the car, or after he had been taken out of it, was amazed that he should be dead. There was no sign of accident, no perceptible wound, no appearance, in fact, of any cause why he should be a tranquil corpse and not an alert and agile devil. Even when a post-mortem examination was made, the doctors were puzzled. A threadlike solution of continuity was discovered in certain parts of his body, but it was lost in others, and the coroner's verdict was that he came to his death from unknown causes while descending a shaft. The general opinion was that in some way or other he had been frightened to death. This accident, much to Roland Clewe's chagrin, discovered to the public the existence of the great shaft. Whether or not he would announce its existence himself, or whether he would close it up, had not been determined by Clewe; but when he and Margaret had talked over the matter soon after the terrible incident, his mind was made up beyond all possibility of change, and, by means of great bombs, the shaft was shattered and choked up for a depth of half a mile from its mouth. When this work was accomplished, nothing remained but a shallow well, and, when this had been filled up with solid masonry, the place where the shaft had been was as substantial as any solid ground. Now the great discovery was probably shut out forever from the world, but Clewe was well satisfied. He would never make another shaft, and it was not to be expected that men would plan and successfully construct one which would reach down to the transparent nucleus of the earth. The terrible fate, whatever it was, which had overtaken Rovinski, should not, if Clewe could help it, overtake any other human being.