The hitherto guarded subject pertains to my non-professional visit to Egypt fourteen years ago, and has been avoided by me for several reasons. For one thing, I am averse to exploiting certain unmistakably actual facts and conditions obviously unknown to the myriad tourists who throng about the pyramids and apparently secreted with much diligence by the authorities at Cairo, who cannot be wholly ignorant of them. For another thing, I dislike to recount an incident in which my own fantastic imagination must have played so great a part. What I saw—or thought I saw—certainly did not take place; but is rather to be viewed as a result of my then recent readings in Egyptology, and of the speculations anent this theme which my environment naturally prompted. These imaginative stimuli, magnified by the excitement, of an actual event terrible enough in itself, undoubtedly gave rise to the culminating horror of that grotesque night so long past.