A ripping noise made her start up, alert on the instant. The red envelope of the mushroom had split across the top, and a thick cloud of brownish-red dust was spurting in every direction. It formed a pyramidal cloud some thirty feet in height, which enlarged and grew thinner with minor eddies within itself.

A little yellow butterfly with wings barely a yard from tip to tip, flapped lazily above the mushroom-covered plain. Its wings beat the air with strokes that seemed like playful taps upon a friendly element. The butterfly was literally intoxicated with the sheer joy of living. It had emerged from its cocoon barely two hours before, and was making its maiden flight above the strange and wonderful world. It fluttered carelessly into the red-brown cloud of mushroom spores.

The woman was watching the slowly changing form of the spore-mist. She saw the butterfly enter the brownish dust, and then her eyes became greedy. There was something the matter with the butterfly. Its wings no longer moved lazily and gently. They struck out in frenzied, hysterical blows that were erratic and wild. The little yellow creature no longer floated lightly and easily, but dashed here and there, wildly and without purpose, seeming to be in its death-throes.

It crashed helplessly against the ground and lay there, moving feebly. The woman hurried forward. The wings would be new fabric with which to adorn herself, and the fragile legs of the butterfly contained choice meat. She entered the dust-cloud.

A stream of intolerable fire—though the woman had never seen or known of fire—burned her nostrils and seared her lungs. She gasped in pain, and the agony was redoubled. Her eyes smarted as if burning from their sockets, and tears blinded her.

The woman instinctively turned about to flee, but before she had gone a dozen yards—blinded as she was—she stumbled and fell to the ground. She lay there, gasping, and uttering moans of pain, until one of the men of the tribe who had been engaged in foraging near by saw her and tried to find what had injured her.

She could not speak, and he was about to leave her and tell the other tribefolk about her when he heard the clicking of an ant's limbs, and rather than have the ant pick her to pieces bit by bit—and leave his curiosity ungratified—the man put her across his shoulders and bore her back to the hiding-place of the tribe.

It was the tale the woman had told when she partly recovered that caused Burl to sit alone all that night beneath the shining toadstool in the little clearing, puzzling his just-awakened brain to know what to do.

The year before there had been no red mushrooms. They had appeared only recently, but Burl dimly remembered that one day, a long time before, there had been a strange breeze which blew for three day and nights, and that during the time of its blowing all the tribe had been sick and had wept continually.

Burl had not yet reached the point of mental development when he would associate that breeze with a storm at a distance, or reason that the spores of the red mushrooms had been borne upon the wind to the present resting-places of the deadly fungus growths. Still less could he decide that the breeze had not been deadly only because it was lightly laden with the fatal dust.