"Mr. Jackson is a cranky old goat of sixty-nine who has a two-year history of ulcer. He's bled out twice before: two years ago, and again last year. Each time he was warned to change his habits; each time he went back to his old ways, and began bleeding again. At the time of the Piedmont contact, he was treating his problems with his own regimen: a bottle of aspirin a day and some Sterno on top of it. He says this left him a little short of breath."

"And made him acidotic as hell," Burton said.

"Exactly."

Methanol, when broken down by the body, was converted to formaldehyde and formic acid. In combination with aspirin, it meant Jackson was consuming great quantities of acid. The body had to maintain its acid-base balance within fairly narrow limits or death would occur. One way to keep the balance was to breathe rapidly, and blow off carbon dioxide, decreasing carbonic acid in the body.

Stone said, "Could this acid have protected him from the organism?"

Hall shrugged. "Impossible to say."

Leavitt said, "What about the infant? Was it anemic?"

"No," Hall said. "But on the other hand, we don't know for sure that it was protected by the same mechanism. It might have something entirely different."

"How about the acid-base balance of the child?"

"Normal," Hall said. "Perfectly normal. At least it is now."

There was a moment of silence. Finally Stone said, "Well, you have some good leads here. The problem remains to discover what, if anything, that child and that old man have in common. Perhaps, as you suggest, there is nothing in common. But for a start, we have to assume that they were protected in the same way, by the same mechanism."

Hall nodded.

Burton said to Stone, "And what have you found in the capsule?"

"We'd better show you," Stone said.

"Show us what?"

"Something we believe may represent the organism," Stone said.

The door said MORPHOLOGY. Inside, the room was partitioned into a place for the experimenters to stand, and a glass-walled isolation chamber further in. Gloves were provided so the men could reach into the chamber and move instruments about.

Stone pointed to the glass dish, and the small fleck of black inside it.

"We think this is our 'meteor,' " he said. "We have found something apparently alive on its surface. There were also other areas within the capsule that may represent life. We've brought the meteor in here to have a look at it under the light microscope."

Reaching through with the gloves, Stone set the glass dish into an opening in a large chrome box, then withdrew his hands.

"The box," he said, "is simply a light microscope fitted with the usual image intensifiers and resolution scanners. We can go up to a thousand diameters with it, projected on the screen here."

Leavitt adjusted dials while Hall and the others stared at the viewer screen.

"Ten power," Leavitt said.

On the screen, Hall saw that the rock was jagged, blackish, dull. Stone pointed out green flecks.