Rip knew that instructors were assigned for eight-year periods. And he knew that the major's specialty was the Planeteer science of exploration, a specialty which required him to be an expert in biology, zoology, anthropology, navigation and astrogation, and land fighting--not to mention a half dozen lesser things. Only ten Planeteers rated expert in exploration, and all were captains or majors. "Where are you going?" Rip asked. "Off to explore something?" "That's it." Major Barris smiled. "Remember once I said that when they gave me the job of cleaning up the goopies on Ganymede, I'd ask for you as a platoon leader?" Rip stared. "Don't tell me that's your assignment!" "Almost. Tell me, would you recommend any more of your men for promotion? I'll need a new sergeant and two more corporals." Rip thought it over. "Koa can check me on this. I'd suggest making Pederson a sergeant and Dowst and Dominico corporals. Kemp and Santos already have promotions." "That would be my choice, too," Koa agreed. "Fine." Barris tapped the envelope. "I'll correct the orders in here and recommend the promotions. We'll get sixteen new recruits from the graduating class at Luna, and that will complete the platoon I'm supposed to organize. Two full platoons are waiting, and the new platoon will give me a full-strength squadron, except for new officers. How about Flip Villa for a platoon commander, Rip?" Rip knew the Mexican officer was among the best of his own graduating class. "I have to admit prejudice," he warned. "Flip is a pal of mine. But I don't think you could do better." His curiosity got the better of him, and he asked "Can you tell me what this is all about?" Joe Barris reached over and rubbed Rip's bald head. "By the time fur grows back on that irradiated dome of yours, I'll be on my way with Koa, Pederson, and the new recruits. Santos and the rest of your crew will report to Terra base. Flip Villa will join them there. You'll be on Earth leave for eight weeks, but it will take about that much time for Flip and the men to assemble the supplies and equipment we'll need." He pulled a sheaf of papers out of the envelope. "Koa, here are orders for you and your men. They say you're to report to Special Order Squadron Seven, on Ganymede. SOS Seven is a new squadron, the first one organized exclusively for exploration duties, and I'm its commanding officer. Koa, you'll be my senior noncommissioned officer. I want you and Pederson with me, because you can organize the new recruits en route. They have a lot more to learn from you than they got in their two years of training. You'll make real Planeteers out of 'em." He picked a paper from the sheaf and waived it at Rip. "This is for you, Lieutenant Foster." He read, "Foster, R. I. P., Lieutenant, SOS. Serial seven-nine-four-three. Authorized eight weeks' leave upon discharge from hospital. Upon completion of leave, subject officer will report to Terra base for transportation to SOS Seven on Ganymede."