"What's his status now?"

"Uncertain," Stone said. "He is unconscious, and he was vomiting blood earlier today. We've started intravenous dextrose to keep him fed and hydrated until we can get down to the bottom."

Stone flicked a button and the screen showed the baby. It was howling, strapped down to a tiny bed. An intravenous bottle was running into a vein in the scalp.

"This little fellow also survived last night," Stone said. "So we brought him along. We couldn't really leave him, since a Directive 7-12 was being called. The town is now destroyed by a nuclear blast. Besides, he and Jackson are living clues which may help us unravel this mess."

Then, for the benefit of Hall and Leavitt, the two men disclosed what they had seen and learned at Piedmont. They reviewed the findings of rapid death, the bizarre suicides, the clotted arteries and the lack of bleeding.

Hall listened in astonishment. Leavitt sat shaking his head.

When they were through, Stone said, "Questions?"

"None that won't keep," Leavitt said.

"Then let's get started," Stone said.

They began at a door, which said in plain white letters: TO LEVEL II. It was an innocuous, straightforward, almost mundane sign. Hall had expected something more—perhaps a stern guard with a machine gun, or a sentry to check passes. But there was nothing, and he noticed that no one had badges, or clearance cards of any kind.

He mentioned this to Stone. "Yes," Stone said. "We decided against badges early on. They are easily contaminated and difficult to sterilize; usually they are plastic and high-heat sterilization melts them."

The four men passed through the door, which clanged shut heavily and sealed with a hissing sound. It was airtight. Hall faced a tiled room, empty except for a hamper marked "clothing." He unzipped his jumpsuit and dropped it into the hamper; there was a brief flash of light as it was incinerated.

Then, looking back, he saw that on the door through which he had come was a sign: "Return to Level I is NOT Possible Through this Access."

He shrugged. The other men were already moving through the second door, marked simply EXIT. He followed them and stepped into clouds of steam. The odor was peculiar, a faint woodsy smell that he guessed was scented disinfectant. He sat down on a bench and relaxed, allowing the steam to envelop him. It was easy enough to understand the purpose of the steam room: the heat opened the pores, and the steam would be inhaled into the lungs.

The four men waited, saying little, until their bodies were coated with a sheen of moisture, and then walked into the next room.

Leavitt said to Hall, "What do you think of this?"

"It's like a goddam Roman bath," Hall said.

The next room contained a shallow tub ("Immerse Feet ONLY") and a shower. ("Do not swallow shower solution. Avoid undue exposure to eyes and mucous membranes.") It was all very intimidating. He tried to guess what the solutions were by smell, but failed; the shower was slippery, though, which meant it was alkaline. He asked Leavitt about this, and Leavitt said the solution was alpha chlorophin at pH 7.7. Leavitt said that whenever possible, acidic and alkaline solutions were alternated.