outselling Puffyloaves by an infinity factor. So far this morning, there has not been one single delivery of Puffyloaves to any sales spot! Complaints about non-delivery are pouring in from both walking stores and sessile shops." "Mr. Snedden!" Gryce barked. "What bug in the new helium process might account for this delay?" Roger was on his feet, looking bewildered. "I can't imagine, sir, unless—just possibly—there's been some unforeseeable difficulty involving the new metal-foil wrappers." "Metal-foil wrappers? Were you responsible for those?" "Yes, sir. Last-minute recalculations showed that the extra lightness of the new loaf might be great enough to cause drift during stackage. Drafts in stores might topple sales pyramids. Metal-foil wrappers, by their added weight, took care of the difficulty." "And you ordered them without consulting the Board?" "Yes, sir. There was hardly time and—" "Why, you fool! I noticed that order for metal-foil wrappers, assumed it was some sub-secretary's mistake, and canceled it last night!" Roger Snedden turned pale. "You canceled it?" he quavered. "And told them to go back to the lighter plastic wrappers?" "Of course! Just what is behind all this, Mr. Snedden? What recalculations were you trusting, when our physicists had demonstrated months ago that the helium loaf was safely stackable in light airs and gentle breezes—winds up to Beaufort's scale 3. Why should a change from heavier to lighter wrappers result in complete non-delivery?" ROGER Snedden's paleness became tinged with an interesting green. He cleared his throat and made strange gulping noises. Tin Philosopher's photocells focused on him calmly, Rose Thinker's with unfeigned excitement. P.T. Gryce's frown grew blacker by the moment, while Megera Winterly's Venus-mask showed an odd dawning of dismay and awe. She was getting new squawks in her earphones. "Er ... ah ... er...." Roger said in winning tones. "Well, you see, the fact is that I...." "Hold it," Meg interrupted crisply. "Triple-urgent from Public Relations, Safety Division. Tulsa-Topeka aero-express makes emergency landing after being buffeted in encounter with vast flight of objects first described as brown birds, although no failures reported in airway's electronic