"Suddenly the strangeness of the whole thing struck me like a blow. The great, unseen wall before me, the circle of sand, flat and unchanging, and myself, standing there and wondering, wondering. A voice from out the dead city behind me seemed to sound in my heart, bidding me to turn and flee, to get away. I remembered the warning of the inscription, 'Go not to Mamurth.' And as I thought of the inscription, I had no doubt that this was the great temple described by San-Drabat. Surely he was right: the like of it was not on earth elsewhere.
"But I would not go, I could not go, until I had examined the wall from the inside. Calmly reasoning the matter, I decided that the logical place for the gateway through the wall would be at the end of the avenue, so that those who came down the street could pass directly through the wall. And my reasoning was good, for it was at that spot that I found the entrance: an opening in the barrier, several yards wide, and running higher than I could reach, how high I had no means of telling.
"I felt my way through the gate, and stepped at once upon a floor of hard material, not as smooth as the wall's surface, but equally invisible. Inside the entrance lay a corridor of equal width, leading into the center of the circle, and I felt my way forward.
"I must have made a strange picture, had there been any there to observe it. For while I knew that all around me were the towering, invisible walls, and I knew not what else, yet all my eyes could see was the great flat circle of sand beneath me, carpeted with the afternoon sunshine. Only, I seemed to be walking a foot above the ground, in thin air. That was the thickness of the floor beneath me, and it was the weight of this great floor, I knew, that held the circle of sand under it for ever flat and unchanging.
"Iwalked slowly down the passageway, with hands outstretched before me, and had gone but a short distance when I brought up against another smooth wall that lay directly across the corridor, seemingly making it a blind alley. But I was not discouraged now, for I knew that there must be a door somewhere, and began to feel around me in search of it.
"I found the door. In groping about the sides of the corridor my hands encountered a smoothly rounded knob set in the wall, and as I laid my hand on this, the door opened. There was a sighing, as of a little wind, and when I again felt my way forward, the wall that had I lain across the passageway was gone, and I was free to go forward. But I dared not go through at once. I went back to the knob on the wall, and found that no amount of pressing or twisting of it would close the door that had opened. Some subtle mechanism within the knob had operated, that needed only a touch of the hand to work it, and the whole end of the corridor had moved out of the way, sliding up in grooves, I think, like a portcullis, though of this I am not sure.
"But the door was safely opened, and I passed through it. Moving about, like a blind man in a strange place, I found that I was in a vast inner court, the walls of which sloped away in a great curve. When I discovered this, I came back to the spot where the corridor opened into the court, and then walked straight out into the court itself.
"It was steps that I encountered: the first broad steps of what was evidently a staircase of titanic proportions. And I went up, slowly, carefully, feeling before me every foot of the way. It was only the feel of the staircase under me that gave reality to it, for as far as I could see, I was simply climbing up into empty space. It was weird beyond telling.
"Up and up I went, until I was all of a hundred feet above the ground, and then the staircase narrowed, the sides drew together. A few more steps, and I came out on a flat floor again, which, after some groping about, I found to be a broad landing, with high, railed edges. I crawled across this landing on hands and knees, and then struck against another wall, and in it, another door. I went through this too, still crawling, and though everything about me was still in. visible, I sensed that I was no longer in the open air, but in a great room.
"I stopped short, and then, as I crouched on the floor, I felt a sudden prescience of evil, of some malignant, menacing entity that was native here. Nothing I could see, or hear, but strong upon my brain beat the thought of something infinitely ancient, infinitely evil, that was a part of this place. Was it a consciousness, I wonder, of the horror that had filled the place in ages long dead? Whatever caused it, I could go no farther in the face of the terror that possessed me; so I drew back and walked to the edge of the landing, leaning over its high, invisible railing and surveying the scene below.