He followed the directions and felt a kind of cold heat on his body. It lasted perhaps five minutes, and then he heard the buzzer and opened his eyes. His body was dry. He followed the others to a corridor, consisting of four showers. Walking down the corridor, he passed beneath each shower in turn. At the end, he found blowers, which dried him, and then clothing. This time the clothing was white.

They dressed, and took the elevator down to Level III.

There were four nurses waiting for them; one took Hall to an examining room. It turned out to be a two-hour physical examination, given not by a machine but by a blank-faced, thorough young man. Hall was annoyed, and thought to himself that he preferred the machine.

The doctor did everything, including a complete history birth, education, travel, family history, past hospitalizations and illnesses. And an equally complete physical. Hall became angry; it was all so damned unnecessary. But the doctor shrugged and kept saying, "It's routine."

After two hours, he rejoined the others, and proceeded to Level IV.

Four total-immersion baths, three sequences of ultraviolet and infrared light, two of ultrasonic vibrations, and then something quite astonishing at the end. A steel-walled cubicle, with a helmet on a peg. The sign said, "This is an ultraflash apparatus. To protect head and facial hair, place metal helmet securely on head, then press button below."

Hall had never heard of ultraflash, and he followed directions, not knowing what to expect. He placed the helmet over his head, then pressed the button.

There was a single, brief, dazzling burst of white light, followed by a wave of heat that filled the cubicle. He felt a moment of pain, so swift he hardly recognized it until it was over. Cautiously, he removed the helmet and looked at his body. His skin was covered with a fine, white ash—and then he realized that the ash was his skin, or had been: the machine had burned away the outer epithelial layers. He proceeded to a shower and washed the ash off. When he finally reached the dressing room, he found green uniforms.

Another physical. This time they wanted samples of everything: sputum, oral epithelium, blood, urine, stool. He submitted passively to the tests, examinations, questions. He was tired, and was beginning to feel disoriented. The repetitions, the new experiences, the colors on the walls, the same bland artificial light . . .

Finally, he was brought back to Stone and the others. Stone said, "We have six hours on this level—that's protocol, waiting while they do the lab tests on us—so we might as well sleep. Down the corridor are rooms, marked with your names. Further down is the cafeteria. We'll meet there in five hours for a conference. Right?"

Hall found his room, marked with a plastic door tag. He entered, surprised to find it quite large. He had been expecting something the size of a Pullman cubicle, but this was bigger and better-furnished. There was a bed, a chair, a small desk, and a computer console with built-in TV set. He was curious about the computer, but also very tired. He lay down on the bed and fell asleep quickly.