The captain took a piece of paper from Mac and gave it to Garry. “Mac and I have plotted your course as nearly as we can from what we remember of this territory. We both had a course in lunar study at one time. Follow these landmarks closely. You will be heading straight for the mining settlement, and if, by chance, a search flier should be coming from that direction, try to catch their attention by waving. They will probably be looking for you, and your bright-colored suits will make you stand out pretty strong against the gray ground.” Garry was studying the penciled map. “What is this gray part that you’ve shown here, Captain?” “It’s an area of rugged rock formations,” the captain explained. “You’ve got to go through it, as there is no way around. You must proceed with extreme caution, because we haven’t any flashlights left to give you. And, owing to the fact that there is just a trace of air on Luna, the earthshine can’t penetrate into the shadows. You will literally have to inch yourselves along until you’re in the open again.” The captain explained more of the dangers in this area and showed Garry and Patch other points on the map and what they stood for. Finally, the boys had their last look at the man who had been the best friend to them that they had ever known. Garry studied the captain’s brave, forced smile, and he could see the elderly man’s efforts to keep himself under control. Captain Eaton wiped his moist palm on his trousers and then pushed the button that swung open the inner door of the air lock. “There’s something I must tell both of you before you go,” he said. “I made application for adoption of you two as my sons just before we had the accident. I have a friend in a high position back on earth who, I felt, could put through the papers quickly if they were approved. I never told you this, though, because I did not want to raise your hopes falsely in case the adoption was not approved. But I couldn’t let you go not knowing what I had tried to do.” “We would have liked you for a father,” Patch said. Garry was too choked up to say anything except, “Let’s go, Patch, before we change our minds and never go at all.” “Yes, that is better,” the captain said. “Good-by, boys, and may God go with you.” The boys pulled on their helmets, and Captain Eaton helped fit them tightly. Then he made a little farewell wave with his hand and motioned the boys into the air lock. A moment later the door swished shut. The outer door opened, and the bleak face of Luna beckoned to them. They stepped out into the gray dust, and the “snowshoe” plates added to the bottom of their boots kept them from sinking too deeply into the moon dust. They were now on their own. 17. DARK PERIL