How had he found out? Bryce forced down the question as he stiffly reholstered his magnomatic. There was no use thinking of that until the question of surviving the next five minutes was settled. He stood with his hands empty, feeling curiously empty inside, oddly missing the white rage and love of murder that usually carried him through such things. It seemed too good a day to spoil. He would rather have continued his way to lunch with Sheila, and let the man live--or let himself live. This would be no duel for a little bloodletting. Beldman's purpose was to kill. And Beldman himself, knowing what he knew, had to die. "Do you understand what you have said, sir?" Bryce used the formal words of the dueling countries. "You're damn well right I do!" "Are you prepared to take the consequences, sir?" "More ready than you are," Beldman said, his hands still on his hips. He amplified his remark with a few well chosen words that harked back to his truck driving days. "How many shots?" Bryce asked more softly, beginning to want to kill. "Until one of us is down with his gun out of his hand." Bryce repeated the provision to the crowd that had drawn up discreetly along the side-lines. "We fire until one of us is both down and disarmed." There was a murmur of surprise among the crowd for that was an unusual and deadly provision for a formal duel. As Bryce paced backward the required number of paces, counting aloud, two men volunteered as seconds. They came forward to compare the guns rapidly and show them to the duelists. It had to be done and finished rapidly, for lunch hour had begun with its flood of people into the corridors, and they were holding up traffic. Bryce's gun was a .42 magnomatic, working on an electrical acceleration of the slug by electromagnetic rings in the thick barrel. It was soundless except for a legal built-in radio yeep that announced its firing and number to the police emergency receivers. Beldman's gun was another maggy of the same make but heavier with a wide-mouthed barrel apparently throwing a much heavier caliber slug. "Ready?" The second stepped back to the edge of the crowd and began counting off half a minute by seconds.