Gordon and Harold both admitted the possibility of thinking entities other than human. But would they ever recognize the physical form of some of these beings? "Hey , Gordon!" Gordon Marlow, Ph.D., straightened up and turned in the direction of the voice, the garden trowel dangling in his dirt-stained white canvas glove. His wide mouth broke into a smile that revealed even white teeth. It was Harold Harper, an undergraduate student, who had called. "Hop over the fence and come in," Gordon invite