replied; "but you must remember I do not know the mere nature of your investigations; and as for the connection between the search and this wonderful valley, it is past my guessing."
He smiled queerly at me. "You must not think I am making a mystery for the sake of mystery," he said. "I do not speak out because, so far, there is nothing to be spoken, nothing definite I mean, nothing that can be set down in hard black and white, as dull and sure and irreproachable as any blue book. And then I have another reason: many years ago a chance paragraph in a newspaper caught my attention, and focussed in an instant the vagrant thoughts and half-formed fancies of many idle and speculative hours into a certain hypothesis. I saw at once that I was treading on a thin crust; my theory was wild and fantastic in the extreme, and I would not for any consideration have written a hint of it for publication. But I thought that in the company of scientific men like myself, men who knew the course of discovery, and were aware that the gas that blazes and flares in the gin-palace was once a wild hypothesis; I thought that with such men as these I might hazard my dream—let us say Atlantis, or the philosopher's stone, or what you like—without danger of ridicule. I found I was grossly mistaken; my friends looked blankly at me and at one another, and I could see something of pity, and something also of insolent contempt, in the glances they exchanged. One of them called on me next day, and hinted that I must be suffering from overwork and brain exhaustion. 'In plain terms,' I said, 'you think I am going mad. I
