I believe we felt something coming down from the greenish moon, for when we began to depend on its light we drifted into curious involuntary marching formations and seemed to know our destinations though we dared not think of them. Once we looked at the pavement and found the blocks loose and displaced by grass, with scarce a line of rusted metal to shew where the tramways had run. And again we saw a tram-car, lone, windowless, dilapidated, and almost on its side. When we gazed around the horizon, we could not find the third tower by the river, and noticed that the silhouette of the second tower was ragged at the top. Then we split up into narrow columns, each of which seemed drawn in a different direction. One disappeared in a narrow alley to the left, leaving only the echo of a shocking moan. Another filed down a weed-choked subway entrance, howling with a laughter that was mad. My own column was sucked toward the open country, and presently I felt a chill which was not of the hot autumn; for as we stalked out on the dark moor, we beheld around us the hellish moon-glitter of evil snows. Trackless, inexplicable snows, swept asunder in one direction only, where lay a gulf all the blacker for its glittering walls. The column seemed very thin indeed as it plodded dreamily into the gulf. I lingered behind, for the black rift in the green-litten snow was frightful, and I thought I had heard the reverberations of a disquieting wail as my companions vanished; but my power to linger was slight. As if beckoned by those who had gone before, I half-floated between the titanic snowdrifts, quivering and afraid, into the sightless vortex of the unimaginable.