He walked, rested, walked again. Now and then he was troubled by a burst of violent sweating, followed by shivering fits until his clothes began to dry again. The big moon edged presently over the ridge above him, and in the first flood of its light the opposite slope of the valley took on the appearance of a fanciful sub-oceanic reef. The activity of the animal life about Barney increased promptly. It was no darker now than an evening hour on Earth, and his fellow occupants of the Ecological Base seemed well-adjusted to the strange shifts of day and night to which they had been consigned.

He pushed through a final thicket of shrubbery, and found himself at the edge of the lake. Beyond the almost circular body of water, a towering wall of cliffs sealed the upper end of the valley. He had come almost a mile, and while a mile—a city mile, at least—wouldn\'t have meant much to Barney Chard at one time, he felt quite exhausted now. He sat down at the edge of the water, and, after a minute or two, bent forward and drank from it. It had the same cold, clear flavor as the water in the cabin.

The surface of the water was unquiet. Soft-flying large insects of some kind were swarming about, stippling the nearby stretch of the lake with their touch, and there were frequent swift swirls as fish rose from beneath to take down the flyers. Presently one of them broke clear into the air—a big fish, thick-bodied and shining, looking as long as Barney\'s arm in the moonlight—and dropped back with a splash. Barney grinned twistedly. The NOTES indicated Dr. McAllen had taken............