Without hesitation I obeyed. I walked through the doorway, and I became conscious that the door had closed behind me as I pressed forward. The passage was narrow and but faintly lighted; it bent to the right with a circular sweep as though it skirted the inner circumference of the building; still curving, it sank by a gentle gradient; and then it rose again and turned almost at right angles. Pushing ahead resolutely, although in not a little doubt as to the meaning of my adventure, I thrust aside a heavy curtain, soft to the hand. Then I found myself just inside a large circular hall. Letting the hangings fall behind me, I took three or four irresolute paces which brought me almost to the centre of the room. I saw that the walls were continuously draped with the heavy folds of the same soft velvet, so that I could not even guess where it was I had entered. The rotunda was bare of all furniture; there was no table in it, no chair, no sofa; nor was anything hanging from the ceiling or against the curtained walls. All that the room contained was a set of four curiously shaped narrow stands, placed over against one another at the corners of what might be a square drawn within the circle of the hall. These narrow stands were close to the curtains; they were perhaps a foot wide, each of them, or it might be a little more: they were twice or three times as long as they were wide; and they reached a height of possibly three or four feet. Going towards one of these stands to examine it more curiously, I discovered that there were two projections from the top, resembling eye-pieces, as though inviting the beholder to gaze into the inside of the stand. Then I thought I heard a faint metallic click above my head. Raising my eyes swiftly, I read a few words written, as it were, against the dark velvet of the heavy curtains in dots of flame that flowed one into the other and melted away in a moment. When this mysterious legend had faded absolutely, I could not recall the words I had read in the fitful and flitting letters of fire, and yet I retained the meaning of the message; and I understood that if I chose to peer through the eye-pieces I should see a succession of strange dances. To gaze upon dancing was not what I had gone forth to do, but I saw no reason why I should not do so, as I was thus strangely bidden. I lowered my head until my eyes were close to the two openings at the top of the stand. I looked into blackness at first, and yet I thought that I could detect a mystic commotion of the invisible particles at which I was staring. I made no doubt that, if I waited, in due season the promise would be fulfilled. After a period of expectancy which I could not measure, infinitesimal sparks darted hither and thither, and there was a slight crackling sound. I concentrated my attention on what I was about to see; and in a moment more I was rewarded.