Burl had observed that the mushrooms normally burst only in the daytime, and for a while had thought of causing his followers to do their journeying in the night. Only the obvious disadvantages of such a course--the difficulty of discovering food, and the prowling spiders that roamed in the darkness--had prevented him. The idea still stayed with him, however, and two days after the fight with the hunting wasp he put it in practise. The tribe came to the top of a small rise in the ground. For an hour they had been marching and counter-marching to avoid the suddenly appearing clouds of dust. Once they had been nearly hemmed in, and only by mad sprinting did they escape when three of the dull-red clouds seemed to flow together, closing three sides of a circle. They came to the little hillock and halted. Before them stretched a plain all of four miles wide, colored a brownish brick-red by masses of mushrooms. They had seen mushroom forests before, and knew of the dangers they presented, but there was none so deadly as the plain before them. To right and left it stretched as far as the eye could see, but far away on its farther edge Burl caught a glimpse of flowing water. Over the plain itself a dull-red haze seemed to float. It was nothing more or less than a cloud of the deadly spores, dispersed and indefinite, constantly replenished by the freshly bursting red mushrooms. While the people stood and watched a dozen thick columns of dust rose into the air from scattered points here and there upon the plain, settling slowly again, but leaving behind them enough of their finely divided substance to keep the thin red haze over the whole plain in its original, deadly state. Burl had seen single red mushrooms before, and even small thickets of two and three, but here was a plain of millions, literally millions upon millions of the malignant growths. Here was one fungoid forest through whose aisles no monster beetles stalked, and above whose shadowed depths no brightly colored butterflies fluttered in joyous abandon. There were no loud-voiced crickets singing in its hiding-places, nor bodies of eagerly foraging ants searching inquisitively for bits of food. It was a forest of death, still and silent, quiet and motionless save for the sullen columns of red dust that ever and again shot upward from the torn and ragged envelope of the bursting mushroom. Burl and his people watched in wonderment and dismay, but presently a high resolve came to Burl. The mushrooms never burst at night, and the deadly dust from a subsided cloud was not deadly in the morning. As a matter of fact the rain that fell every night made it no more than a sodden, thin film of reddish mud by daybreak, mud which dried and caked.