Before Sheffield could answer, there was a discreet tap on the door of the Star Chamber and Saul Dagenham was ushered in. Time was when Dagenham was one of the Inner Planets' research wizards, a physicist with inspired intuition, total recall, and a sixth-order computer for a brain. But there was an accident at Tycho Sands, and the fission blast that should have killed him did not. Instead it turned him dangerously radioactive; it turned him "hot"; it transformed him into a twenty-fourth century "Typhoid Mary." He was paid Cr 25,000 a year by the Inner planets government to take precautions which they trusted him to carry out. He avoided physical contact with any person for more than five minutes per day. He could not occupy any room other than his own for more than thirty minutes a day. Commanded and paid by the IP to isolate himself, Dagenham had abandoned research and built the colossus of Dagenham Couriers, Inc.