And across this open space, on cables all of five hundred feet long, a banded spider had flung its web. It was a monster of its tribe. Its belly was swollen to a diameter of no less than two yards, and its outstretched legs would have touched eight points of a ten-yard circle.

It was hanging motionless in the center of the colossal snare as the little group of tribefolk passed underneath, and they saw the broad bands of yellow and black and silver upon its abdomen. They shivered as their little crafts were swept below.

Then they came to a little valley, where yellow sand bordered the river and there was a level space of a hundred yards on either side before the steep sides of the mountains began their rise. Here the cluster of mushroom rafts were caught in a little eddy and drawn out of the swiftly flowing current. Soon there was a soft and yielding jar. The rafts had grounded.

Led by Burl, the tribesmen waded ashore, wonderment and excitement in their hearts. Burl searched all about with his eyes. Toadstools and mushrooms, rusts and molds, even giant puff-balls grew in the little valley, but of the deadly red mushrooms he saw none.

A single bee was buzzing slowly over the tangled thickets of fungoids, and the loud voice of a cricket came in a deafening burst of sound, reechoed from the hillsides, but save for the far-flung web of the banded spider a mile or more away, there was no sign of the deadly creatures that preyed upon men.

Burl began to climb the hillside with his tribefolk after him. For an hour they toiled upward, through confused masses of fungus of almost every species. Twice they stopped to seize upon edible fungi and break them into masses they could carry, and once they paused and made a wide detour around a thicket from which there came a stealthy rustling.

Burl believed that the rustling was merely the sound of a moth or butterfly emerging from its chrysalis, but was unwilling to take any chances. He and his people circled the mushroom thicket and mounted higher.

And at last, perhaps six or seven hundred feet above the level of the river, they came upon a little plateau, going back into a small pocket in the mountainside. Here they found many of the edible fungoids, and no less than a dozen of the giant cabbages, on whose broad leaves many furry grubs were feeding steadily in placid contentment with themselves and all the world.

A small stream bubbled up from a tiny basin and ran swiftly across the plateau, and there were dense thickets of toadstools in which the tribesmen might find secure hiding-places. The tribe would make itself a new home here.

That night they hid among inextricably tangled masses of mushrooms, and saw with amazement the multitude of creatures that ventured forth in the darkness. All the valley and the plateau were illumined by the shining beacons of huge but graceful fireflies, who darted here and there in delight and—apparently—in security.