Henderson's lovely flowers were going to bring him fame—until they walked and talked too much. The ringing of the door bell cut into Henderson's concentration and he made a gesture of irritation with one outflung hand. But he didn't raise his head or shift his eyes one iota from the tiny green thing on his laboratory table. Tensely absorbed, he stood watching the small miracle he had made and emotion approaching exultation gripped him. He slid one hand toward a switch, never moving his eyes from