[Transcriber Note: This etext was produced from IF Worlds of Science Fiction March 1953. Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.] George Harrison noticed the flashing red light on the instrument panel as he turned onto the bridge to Balboa Island. Just over the bridge, he pulled the car to the curb and flipped the switch with violence. "Harrison," he muttered. "How's the water, fella?" asked the voice of Bob Mills, his assistant. T