"What happened?"

"Professor Kirke is in the hospital," General Marcus said. "You'll get further details when you touch down."

The conversation ended; Stone gave the telephone back to the officer. He thought for a minute about the other men on the team, and wondered at their reactions as they were called out of bed.

There was Leavitt, of course. He would respond quickly. Leavitt was a clinical microbiologist, a man experienced in the treatment of infectious disease. Leavitt had seen enough plagues and epidemics in his day to know the importance of quick action. Besides, there was his ingrained pessimism, which never deserted him. (Leavitt had once said, "At my wedding, all I could think of was how much alimony she'd cost me.") He was an irritable, grumbling, heavyset man with a morose face and sad eyes, which seemed to peer ahead into a bleak and miserable future; but he was also thoughtful, imaginative, and not afraid to think daringly.

Then there was the pathologist, Burton, in Houston. Stone had never liked Burton very well, though he acknowledged his scientific talent. Burton and Stone were different: where Stone was organized, Burton was sloppy; where Stone was controlled, Burton was impulsive; where Stone was confident, Burton was nervous, jumpy, petulant. Colleagues referred to Burton as "the Stumbler," partly because of his tendency to trip over his untied shoelaces and baggy trouser cuffs and partly because of his talent for tumbling by error into one important discovery after another.

And then Kirke, the anthropologist from Yale, who apparently was not going to be able to come. If the report was true, Stone knew he was going to miss him. Kirke was an ill-informed and rather foppish man who possessed, as if by accident, a superbly logical brain. He was capable of grasping the essentials of a problem and manipulating them to get the necessary result; though he could not balance his own checkbook, mathematicians often came to him for help in resolving highly abstract problems.

Stone was going to miss that kind of brain. Certainly the fifth man would be no help. Stone frowned as he thought about Mark Hall. Hall had been a compromise candidate for the team; Stone would have preferred a physician with experience in metabolic disease, and the choice of a surgeon instead had been made with the greatest reluctance. There had been great pressure from Defense and the AEC to accept Hall, since those groups believed in the Odd Man Hypothesis; in the end, Stone and the others had given in.

Stone did not know Hall well; he wondered what he would say when he was informed of the alert. Stone could not have known of the great delay in notifying members of the team. He did not know, for instance, that Burton, the pathologist, was not called until five a.m., or that Peter Leavitt, the microbiologist, was not called until six thirty, the time he arrived at the hospital.

And Hall was not called until five minutes past seven.