After I had been proceeding for some time along the passage, I found that it was growing gradually higher. The air was cooler, and raising my head cautiously in order not to bump it against the ceiling, I discovered that I was able to stand upright. I lifted my hand, first a few inches, and then to the full extent of my arm; but the roof was still beyond my reach. I moved a little to my right in order to ascertain if I could touch the wall, and then to the left. But once more only air rewarded me. It was evident that I had left the passage and was standing in some large apartment; but, since I knew nothing of the interior of the Pyramid, I could not understand what it was or where it could be situated. Feeling convinced in my own mind that I had missed my way, since I had neither heard nor seen anything of Pharos, I turned round and set off in what I considered must be the direction of the wall; but though I walked step by step, once more feeling every inch of the way with my foot before I put it down, I seemed to have covered fifty yards before my knuckles came in contact with it. Having located it, I fumbled my way along it in the hope that I might discover the doorway through which I had entered; but though I tried for some considerable time, no sort of success rewarded me. I paused and tried to remember which way I had been facing when I made the discovery that I was no longer in the passage. In the dark, however, one way seemed like another, and I had turned myself about so many times that it was impossible to tell which was the original direction. Oh, how bitterly I repented having ever left the hotel! For all I knew to the contrary I might have wandered into some subterranean chamber never visited by the Bedouins or tourists, whence my feeble cries for help would not be heard, and in which I might remain until death took pity on me and released me from my sufferings.