with racing thoughts. You have known what it was to be in a nightmare in which you feel that there is some all-important thing for which you search and which you know is there, though it remains forever just beyond your reach. That was how I felt that evening as I stood alone by that place of death. Then at last I turned and walked slowly homeward.
I had just reached the top of the path when it came to me. Like a flash, I remembered the thing for which I had so eagerly and vainly grasped. You will know, or Watson has written in vain, that I hold a vast store of out-of-the-way knowledge without scientific system, but very available for the needs of my work. My mind is like a crowded box-room with packets of all sorts stowed away therein—so many that I may well have but a vague perception of what was there. I had known that there was something which might bear upon this matter. It was still vague, but at least I knew how I could make it clear. It was monstrous, incredible, and yet it was always a possibility. I would test it to the full.