I remembered Pitt-Heron very well. He had been at Oxford with me, but he was no great friend of mine, though for about two years Tommy and he had been inseparable. He had had a prodigious reputation for cleverness with everybody but the college authorities, and used to spend his vacations doing mad things in the Alps and the Balkans and writing about them in the half-penny press. He was enormously rich--cotton mills and Liverpool ground rents--and, being without a father, did pretty much what his fantastic taste dictated. He was rather a hero for a bit after he came down, for he had made some wild journey in the neighbourhood of Afghanistan and written an exciting book about it. Then he married a pretty cousin of Tommy's, who happened to be the only person that ever captured my stony heart, and settled down in London. I did not go to their house, and soon I found that very few of his friends saw much of him, either. His travels and magazine articles suddenly stopped, and I put it down to the common course of successful domesticity. Apparently I was wrong. "Charles Pitt-Heron," said Tommy, "is blowing up for a most thundering mess." I asked what kind of mess, and Tommy said he didn't know. "That's the mischief of it. You remember the wild beggar he used to be, always off on the spree to the Mountains of the Moon, or somewhere. Well, he has been damping down his fires lately and trying to behave like a respectable citizen, but God knows what he has been thinking! I go a good deal to Portman Square, and all last year he has been getting queerer." Questions as to the nature of the queerness only elicited the fact that Pitt-Heron had taken to science with some enthusiasm. "He has got a laboratory at the back of the house--used to be the billiard-room--where he works away half the night. And Lord! The crew you meet there! Every kind of heathen--Chinese and Turks, and long-haired chaps from Russia, and fat Germans. I've several times blundered into the push. They've all got an odd secretive air about them, and Charlie is becoming like them. He won't answer a plain question or look you straight in the face. Ethel sees it, too, and she has often talked to me about it." I said I saw no harm in such a hobby. "I do," said Tommy grimly. "Anyhow, the fellow has bolted." "What on earth----" I began, but was cut short. "Bolted without a word to a mortal soul. He told Ethel he would be home for luncheon yesterday, and never came. His man knew nothing about him, hadn't packed for him, or anything; but he found he had stuffed some things into a kit-bag and gone out by the back through the mews. Ethel was in terrible straits, and sent for me, and I ranged all yesterday afternoon like a wolf on the scent. I found he had drawn a biggish sum in gold from the bank, but I couldn't find any trace of where he had gone.