While the boys talked of the marvelous thing before them a stranger of quiet mien stood watching them from an elevation a few yards away. He was a man of middle age, with brilliant black eyes, long, like those of an Oriental, and a figure almost boyish in its proportions. He was neatly dressed in a dark suit of some soft, expensive material, his linen was spotless, and a diamond of great value and brilliancy glimmered in his pure white tie.