“Our plan had been that Smith the stoker should chloroform John Slater the driver, so that he should vanish with the others. In this respect, and in this respect only, our plans miscarried—I except the criminal folly of McPherson in writing home to his wife. Our stoker did his business so clumsily that Slater in his struggles fell off the engine, and though fortune was with us so far that he broke his neck in the fall, still he remained as a blot upon that which would otherwise have been one of those complete masterpieces which are only to be contemplated in silent admiration. The criminal expert will find in John Slater the one flaw in all our admirable combinations. A man who has had as many triumphs as I can afford to be frank, and I therefore lay my finger upon John Slater, and I proclaim him to be a flaw. “But now I have got our special train upon the small line two kilomètres, or rather more than one mile, in length, which leads, or rather used to lead, to the abandoned Heartsease mine, once one of the largest coal mines in England. You will ask how it is that no one saw the train upon this unused line. I answer that along its entire length it runs through a deep cutting, and that, unless some one had been on the edge of that cutting, he could not have seen it. There _was_ some one on the edge of that cutting. I was there. And now I will tell you what I saw. “My assistant had remained at the points in order that he might superintend the switching off of the train. He had four armed men with him, so that if the train ran off the line—we thought it probable, because the points were very rusty—we might still have resources to fall back upon. Having once seen it safely on the side line, he handed over the responsibility to me. I was waiting at a point which overlooks the mouth of the mine, and I was also armed, as were my two companions. Come what might, you see, I was always ready.