He took the big bladder Robin had constructed as an air bag. "This won't work, but it will come in handy in a different way." He took Robin's pocket knife and began to cut the big sack apart to make thin long strips of leather. When he had finished with that, he looked over at Robin and said: "Now you'll have to wind these strips around you as tight as you can. Begin as high up on your chest as possible, and go on down. Wind them around your arms and legs, around your fingers, if possible. Don't undress, but wind the strips over your clothes. Make them tight. I'll help you." As they worked to do so, Peter explained further. "Having an air helmet is not enough for space. The pressure of your blood and the gases in your system will make it impossible for you to breathe or move, if your body is not tightly encased. A real space suit like mine is pressurized, built with a layer of air pockets all over, which increase their pressure in proportion to the decrease outside. But if you don't have this pressure, even having air around your head will not help. So make those bandages tight, as tight as you can without stopping your breathing completely." They worked on, winding the leather around and around, until Robin felt as if he were being encased in a strait jacket, felt like a living mummy. Strips were wrapped around his fingers under his gloves, his gloves fitting over them and further strapped. Next Peter strapped one of his three oxygen tanks to Robin's back. "I hope this will work well enough to keep you breathing until we reach the rocket. Fortunately you made your helmet deep enough to come down far over your shoulders. I can work this air tube up high enough for you to grasp the end in your mouth. The air will force its way into your lungs. You'll have to struggle to force your exhalation out of your nose. It's difficult, especially the first time, but you'll have to cope with it." As he held the helmet preparatory to putting it over Robin's head, he gave him some last-minute instructions. "We won't be able to communicate once I get this on you. You've no radio and your mouth will be full anyway. So listen carefully. "The rocket is about a hundred yards away. I'll lead the way, and I'll tie this cord around your waist so you won't lose me. Follow me as close as you can. There's a possibility that your glass plate may fog up or ice over from the water vapor inside your helmet. If it does, hang on to the cord and keep moving after me! But don't stop ... and don't give up! All set?" Robin's heart was beating fast, he felt strange and stifled in his bindings. This was the zero instant. He nodded, held out his hand. Peter grasped it, shook it. "When you're all set, follow me across the wind stream. It's powerful--don't let it throw you."