Night fell. The clouds above seemed to lower and grow dark. Gradually, now a drop and then a drop, now a drop and then a drop, the languid fall of large, warm raindrops that would drip from the moisture-laden skies all through the night began. The edge of the stream became a place where great disks of coolly glowing flame appeared.
The mushrooms that bordered on the river were faintly phosphorescent (Pleurotus phosphoreus) and shone coldly upon the "rusts" and flake-fungi beneath their feet. Here and there a ball of lambent flame appeared, drifting idly above the steaming, festering earth.
Thirty thousand years before, men had called them "will-o'-the-wisps," but Burl simply stared at them, accepting them as he accepted all that passed. Only a man attempting to advance in the scale of civilization tries to explain everything that he sees. The savage and the child is most often content to observe without comment, unless he repeats the legends told him by wise folk who are possessed by the itch of knowledge.
Burl watched for a long time. Great fireflies whose beacons lighted up their surroundings for many yards—fireflies Burl knew to be as long as his spear—shed their intermittent glows upon the stream. Softly fluttering wings, in great beats that poured torrents of air upon him, passed above Burl.
The air was full of winged creatures. The night was broken by their cries, by the sound of their invisible wings, by their cries of anguish and their mating calls. Above him and on all sides the persistent, intense life of the insect world went on ceaselessly, but Burl rocked back and forth upon his frail mushroom boat and wished to weep because he was being carried from his tribe, and from Saya—Saya of the swift feet and white teeth, of the shy smile.
Burl may have been homesick, but his principal thoughts were of Saya. He had dared greatly to bring a gift of fresh meat to her, meat captured as meat had never been known to be taken by a member of the tribe. And now he was being carried from her!
He lay, disconsolate, upon his floating atom on the water for a great part of the night. It was long after midnight when the mushroom raft struck gently and remained grounded upon a shallow in the stream.
When the light came in the morning, Burl gazed about him keenly. He was some twenty yards from the shore, and the greenish scum surrounded his now disintegrating vessel. The river had widened out until the other bank was barely to be seen through the haze above the surface of the river, but the nearer shore seemed firm and no more full of dangers than the territory his tribe inhabited. He felt the depth of the water with his spear, then was struck with the multiple usefulness of that weapon. The water would come to but slightly above his ankles.
Shivering a little with fear, Burl stepped down into the water, then made for the bank at the top of his speed. He felt a soft something clinging to one of his bare feet. With an access of terror, he ran faster, and stumbled upon the shore in a panic. He stared down at his foot. A shapeless, flesh-colored pad clung to his heel, and as Burl watched, it began to swell slowly, while the pink of its wrinkled folds deepened.