It grew larger, until suddenly the roof rose and I found myself in a gigantic chamber.

So high it was that I could not make out anything of the roof, though the place was brightly lit with torches stuck round the wall, and a great fire which burned at the farther end.

But the wonder was on the left side, where the floor ceased in a chasm.

The left wall was one sheet of water, where the river fell from the heights into the infinite depth, below.

The torches and the fire made the sheer stream glow and sparkle like the battlements of the Heavenly City.