of the building yonder was most unusual and strange. But it was familiar, fearfully familiar. It was shaped like a huge human head. The skull was bald, glistening in the sun with great brilliance, as if the sun itself nestled on the cranium. But why the familiarity, when I could never have seen this building, or any like it, in all of my life? I asked myself these questions as I strode swiftly toward the "mouth," the front of the building. After all, how did I know I'd never before seen such a building, when I could not remember my yesterdays? Swiftly I strode along the path, toward the strange Building of the Skull. I was close enough that the facade of the strange building was beginning to lose its details, to become a smoothly rounded front, when I understood why the Building of the Skull looked so familiar. The building's facade was my own face! The skull was my skull, vastly magnified! Whoever had erected this weird building had most certainly used my skull, or the skull of a twin of mine, as his model! I had scarcely absorbed this utterly fantastic thought than I realized something else, something that I could not have seen until I lost the outer, apparent detail of the Building of the Skull, by coming close enough to see smaller, more intimate details. Then I made my second, most amazing discovery. The Building of the Skull was walled, roofed and domed, by an infinite mosaic of tiny hexagonal doors! They were doors of a strange shining metal which something inside told me was far more precious than gold. There was a tiny lock in each door, in each lock a tiny key, and the voice of Doctor A, calm, sure, unexcited, came again to direct me. "Choose the proper key, Father Wulstan. You know which one it is!" My hand went unerringly to one of the tiny gray keys in one of the tiny gray doors. My thumb and forefinger turned the key without difficulty, as if the key and the lock were forever freshly oiled. It made no sound. As the little door opened, there was the sensation of speed, but not of crossing a threshold. Memory came rushing back, so swiftly that I, Father Wulstan, did not even know that I had forgotten anything. The place was the crypt of Saint Dennis, far under the church, deep in the bowels of the earth. The country was