As the engineer turned to leave, rapping the rolled blueprints nervously against his calf, a great pig of iron that had been sailing up from the background swung dangerously toward his head. The foundryman cried out. He leaped forward, seized the engineer by the shoulder and sent him tumbling to the concrete floor. The blueprints went flying. He pulled the engineer to his feet immediately and tried to straighten the dazed man who could only stare at the tons of iron that sailed serenely on. The foundryman picked up the scattered sheets and started to sort them. Abruptly he stopped and examined one of the pages closely. He began to look through the others, but before he could go any further, the blueprints were snatched from his hands. He said: "What's this casting for?" The engineer rolled the sheets together with quick, intense motions. He said: "None of your blasted business." "I think I know. That's one-quarter a cyclotron. You're getting the other parts made up in different foundries, aren't you?" There was no answer. "Maybe you've forgotten Stabilization Rule 930." "I haven't forgotten. You're crazy." "Want me to call for official inspection?" The engineer took a breath, then shrugged. He said: "I suppose the only way to convince you is to show you the master drafts. Come on--" * * * * * They left the foundry and trudged across the broad concrete of a landing field to where the fat needle of the auxiliary ship lay. They mounted the ramp to the side port and entered the ship. Inside, the engineer called: "It's happened again, boys. Let's go!" The port swung shut behind them. Spacemen drifted up from the surrounding corridors and rooms. They were rangy and tough-looking and the sub-nosed paralyzers glinted casually in their hands as though they'd been cleaning them and merely happened to bring them along. The foundryman looked around for a long time. At last he said: "So it's this way?" "Yes, it's this way. Sorry." "I'd like you to meet some of my friends, some day--" "Perhaps we will." "They'll have an easier time with you than you're gonna have with me!" He clenched fists and poised himself to spring. The engineer said: "Hey--wait a minute. Don't lose your head. You did me a good turn back there. I'd like to return the favor. I've got more credit than I know what to do with." The foundryman gave him a perplexed glance. He relaxed and began to rub his chin dubiously. He said: "Damn if this isn't a sociable ship. I feel friendlier already--" The engineer grinned. I called: "O.K., that's enough. Cut it," and the scene vanished. "Well?" Yarr asked eagerly. I said: "We're really in the groove now. Let's check back and locate the Stabilization debates on Rule 930." I turned to the C-S. "What's the latest rule number, sir?" Groating said: "Seven fifteen."