The process was invariable. Overhead there was always a thick and unbroken bank of vapor which seemed featureless until sunset. Then, toward the west, the brightness overhead turned orange and then pink, while to the east it simply faded to a deeper gray. As nightfall progressed, the red colorings grew deeper, moving toward mid-sky. Ultimately, scattered blotches of darkness began to spot that reddening sky as it grew darker in tone, going down toward that impossible redness which is indistinguishable from black. It was slowly achieving that redness. Today Burl watched as never before. On the oily surface of the river the colors and shadings of dusk were reflected with incredible faithfulness. The round tops of toadstools along the shore glowed pink. Dragonflies glinted in swift and angular flight, the metallic sheen of their bodies flashing in the redness. Great, yellow butterflies sailed lightly above the stream. In every direction upon the water appeared the scrap-formed boats of a thousand caddis-flies, floating at the surface while they might. Burl could have thrust his hand down into their cavities to seize the white worms nesting there. The bulk of a tardy bee droned heavily overhead. He saw the long proboscis and the hairy hind-legs with their scanty load of pollen. The great, multi-faceted eyes held an expression of stupid preoccupation. The crimson radiance grew dim and the color overhead faded toward black. Now the stalks of ten thousand domed mushrooms lined the river-bank. Beneath them spread fungi of all colors, from the rawest red to palest blue, now all fading slowly to a monochromatic background as the darkness deepened. The buzzing and fluttering and flapping of the insects of the day died down. From a million hiding places there crept out--into the night--the soft and furry bodies of great moths who preened themselves and smoothed their feathery antennae before taking to the air. The strong-limbed crickets set up their thunderous noise, grown gravely bass with the increasing size of the noise-making organs. Then there began to gather on the water those slender spirals of deeper mist which would presently blanket the stream in fog. Night arrived. The clouds above grew wholly black. Gradually the languid fall of large, warm raindrops--they would fall all through the night--began. The edge of the stream became a place where disks of cold blue flame appeared. The mushrooms on the river bank were faintly phosphorescent, shedding a ghostly light over the ground below them. Here and there, lambent chilly flames appeared in mid-air, drifting idly above the festering earth. On other planets men call them "Will-o'-the-wisps," but on this planet mankind had no name for them at all.