For no Grom ship had ever returned to tell. efore dawn they crept through the woods, taking on the coloration of the plants around them. Their Displacers pulsed feebly, sensing the nearness of atomic energy. A tiny, four-legged creature darted in front of them. Instantly, Ger grew four legs and a long, streamlined body and gave chase. "Ger! Come back here!" Pid howled at the Detector, throwing caution to the winds. Ger overtook the animal and knocked it down. He tried to bite it, but he had neglected to grow teeth. The animal jumped free, and vanished into the underbrush. Ger thrust out a set of teeth and bunched his muscles for another leap. "Ger!" Reluctantly, the Detector turned away. He loped silently back to Pid. "I was hungry," he said. "You were not," Pid said sternly. "Was," Ger mumbled, writhing with embarrassment. Pid remembered what the Chief had told him. Ger certainly did have Hunter tendencies. He would have to watch him more closely. "We'll have no more of that," Pid said. "Remember—the lure of Exotic Shapes is not sanctioned. Be content with the shape you were born to." Ger nodded, and melted back into the underbrush. They moved on. At the extreme edge of the woods they could observe the atomic energy installation. Pid disguised himself as a clump of shrubbery, and Ger formed himself into an old log. Ilg, after a moment's thought, became a young oak. The installation was in the form of a long, low building, surrounded by a metal fence. There was a gate, and guards in front of it. The first job, Pid thought, was to get past that gate. He began to consider ways and means. From the fragmentary reports of the survey parties, Pid knew that, in some ways, this race of Men were like the Grom. They had pets, as the Grom did, and homes and children, and a culture. The inhabitants were skilled mechanically,