"Don't I know it!" laughed Dugan. "I've had more passes in my time than you will ever see, Red Army man. Well, if you can't help me, save me a climb by going around to the other side and meeting me there. Then I'll show you passes that will make your eyes pop out."
"You can't go over there," the soldier yelled.
"Why not?" called Dugan, still climbing farther away.
"You have to have a Series Three Special Pass." The soldier's voice began to sound pretty far away.
Dugan stopped, in order to yell back, "I've got a Series Three Special Pass."
"Do you, really, comrade?" shouted the soldier. "What's the number on it?"
Dugan did not dare improvise a number, so he shouted back the suggestion that the soldier do something highly indelicate with the number. The soldier was enchanted by this rugged humor, and not at all offended by the gross language. But he persisted:
"Give me your name, then, comrade, and I'll write it down. You can't go over the hill to the Materials area without a Series Three pass. It's your tough luck if you haven't got one."
"Why can't I?" shouted Dugan.
"Because the Materials would see you and start a riot."