don't think I should ever have got it, I can't run much now. A gusty day, sir, isn't it?" and with this he was turning away, but by little and little I contrived to draw him into the current of conversation, and we walked together eastward. I think the man would have been glad to get rid of me; but I didn't intend to let him go, and he stopped at last in front of a miserable house in a miserable street. It was, I verily believe, one of the most wretched quarters I have ever seen: houses that must have been sordid and hideous enough when new, that had gathered foulness with every year, and now seemed to lean and totter to their fall. "I live up there," said Black, pointing to the tiles, "not in the front--in the back. I am very quiet there. I won't ask you to come in now, but perhaps some other day----" I caught him up at that, and told him I should be only too glad to come and see him. He gave me an odd sort of glance, as if he were wondering what on earth I or anybody else could care about him, and I left him fumbling with his latch-key. I think you will say I did pretty well when I tell you that within a few weeks I had made myself an intimate friend of Black's. I shall never forget the first time I went to his room; I hope I shall never see such abject, squalid misery again. The foul paper, from which all pattern or trace of a pattern had long vanished, subdued and penetrated with the grime of the evil street, was hanging in mouldering pennons from the wall. Only at the end of the room was it possible to stand upright, and the sight of the wretched bed and the odour of corruption that pervaded the place made me turn faint and sick. Here I found him munching a piece of bread; he seemed surprised to find that I had kept my promise, but he gave me his chair and sat on the bed while we talked. I used to go to see him often, and we had long conversations together, but he never mentioned Harlesden or his wife. I fancy that he supposed me ignorant of the matter, or thought that if I had heard of it, I should never connect the respectable Dr. Black of Harlesden with a poor garreteer in the backwoods of London. He was a strange man, and as we sat together smoking, I often wondered whether he were mad or sane, for I think the wildest dreams of Paracelsus and the Rosicrucians would appear plain and sober fact compared with the theories I have heard him earnestly advance in that grimy den of his. I once ventured to hint something of the sort to him. I suggested that something he had said was in flat contradiction to all science and all experience. "No," he answered, "not all experience, for mine counts for something. I am no dealer in unproved theories; what I say I have proved for myself, and at a terrible cost. There is a region of knowledge which you will never know, which wise men seeing from afar off shun like the plague, as well they may, but into that region I have gone. If you knew, if you could even dream of what