"No, I am coming to it. I concentrated my attention on the house two doors further down the road. It would not be difficult to creep along the garden wall even in the dark. Two Chinese gentlemen boarded there, I was told. No one had noticed them very particularly in the neighborhood. There are several boarding-houses in Ossery Road, and many foreigners over here for study or upon business go to live in them. I called, but the Chinese gentlemen were visiting in the country, and were not expected back for another fortnight. As a fact, they were not Chinamen at all, but Tibetans, and I do not fancy they will come back." "Tibetans. How do you know? You did not see them?" "No, it is a guess; because on his last journey Mr. Ratcliffe wandered in Tibet. I have correspondents in Northern India, and it was not very difficult to get this information by cable. You do not know Tibet, Mr. Wigan?" "No." "Nor I, except from travelers' tales and through my correspondents. A curious people, given to fetish worship in peculiar forms. I can tell you of one strange place, strange as Lhasa. Were you to go there presently--it might be too soon yet, I cannot say for certain--but presently, I am convinced you would witness a scene of rejoicing, religious processions in the streets, men wearing hideous masks; and in a temple there you would find an idol with two blue eyes--eyes of sapphire." "Two?" "For some time there has been only one," said Quarles; "the other was stolen. You would find also in this temple talismans, ivory boxes fitting into each other, the smallest containing a little carved head representing the head of the idol. Further, you would be told some strange tales of this idol, of the psychic influence it possesses, and how those who offend it remain always under that influence which brings terror. Were you present at a festival in this temple, you would hear the idol speak. First you would find the great assembly in the attitude of listening, and then from the idol you would hear a sound, half sigh, half groan. I suppose the priests produce it mechanically--I do not know. It may be that----" "If this be true the mystery is solved," I said.