Here was a case in point. I had myself seen all that he had seen, and, indeed, much more; for I had looked on the very people and witnessed their actions, whereas he had never set eyes on any of them. I had examined the little handful of rubbish that he had gathered up so carefully, and would have flung it back under the grate without a qualm. Not a glimmer of light had I perceived in the cloud of mystery, nor even a hint of the direction in which to seek enlightenment. And yet Thorndyke had, in some incomprehensible manner, contrived to piece together facts that I had probably not even observed, and that so completely that he had already, in these few days, narrowed down the field of inquiry to quite a small area.