"Well, let's start planning it out," said Robin. "First, we ought to see what we have to work with. I think that the Glassies simply threw everything I had with me in here too. That should make things fairly simple. What did they have of yours?" They went over to the pile of things, with Korree along to light the way, and examined it. Everything was present. Of Peter's property, his space suit was there, intact, with its three shoulder oxygen tanks. Robin picked up a gun belt that had evidently been part of the outfit, but the holster was empty. Peter commented, "Von Borck took it when he turned on me. He is armed also." But Robin noticed that the German rocket pilot had evidently not thought to take the pack of additional pistol ammunition that was clipped to the belt. He withdrew a clip and turned it over, then said: "We should be able to use these to start a diversion of some sort. If we can get their attention elsewhere, we can easily push aside the rock that seals our cave and make a run for it. We ought not to wait for Von Borck to make up his mind." "Ah yes," said his brother. "There is good gunpowder in those bullets. We could make a small bomb for a fuse or a display." "I think a bomb will do the trick. Let's get at it." Robin suited his action to the words. He sat down, spread a clean piece of cloth he found among Peter's property on the floor and began to pull the cartridges apart and gently shake out the powder. Back on Earth, such a job would have been hard without instruments and great force. Here on the Moon, it was not easy but their strength enabled them to twist off the metal rims. Soon they had a neat little pile of explosive powder gathered together. This they packed into a small glass tube among Peter's explorational equipment until it was tight and filled the space. They twisted a dry fiber until it was cordlike and rolled it in a little remaining powder till it was thoroughly blackened. This they inserted in the end of the tube as a fuse. "Now we should get our stuff together and get ready," said Robin. "I don't think it would be a good idea to go back the way I came in; we'd just be cutting ourselves off. The idea is to reach your rocket on the surface. Which way did you come?" Peter indicated the opposite direction. "I came in through a hole rather high in the wall, came down here along a narrow ledge. I can find it again, I think." "Then let's get into our equipment and get ready," said Robin. He began to load his huge pack again, but Peter intervened. "You really can leave some of that behind now," he said. "Make it easier to move fast. Besides we've got some narrow places to squeeze through on our way to the surface. I'd suggest leaving most of the food behind. Take enough for a couple of meals more. You'll only need your space helmet and space clothes."