"But—" Mitchell said, impatient to examine Macklin for himself. "Very well. Let's step into the hall."

Ferris followed them docilely.

"What have you done to him?" the colonel asked straightforwardly.

"We merely cured him of his headaches," Mitchell said.

"How?"

Mitchell did his best to explain the F-M Virus.

"You mean," the Army officer said levelly "you have infected him with some kind of a disease to rot his brain?"

"No, no! Could I talk to the other man, the doctor? Maybe I can make him understand."

"All I want to know is why Elliot Macklin has been made as simple as if he had been kicked in the head by a mule," Colonel Carson said.

"I think I can explain," Ferris interrupted.