I thought she was right. A wormface ship flying over might spot us, if they could see down as well as up-probably just a matter of touching a control. But our chances were better now. "This is the time to recharge your empty bottle."

"Okay."

None too soon-the bottle which had been almost full had dropped by a third, more like half. She couldn't make it to Tombaugh Station on that -simple arithmetic. So I crossed my fingers and got to work. "Partner, will you untie this cat's cradle?"

While Peewee fumbled at knots, I started to take a drink-then stopped, ashamed of myself. Peewee must be chewing her tongue to work up saliva by now-and I hadn't been able to think of any way to get water to her. The tank was inside my helmet and there was no way to reach it without making me-and Mother Thing-dead in the process.

If I ever lived to be an engineer I'd correct that!

I decided that it was idiotic not to drink because she couldn't; the lives of all of us might depend on my staying in the best condition I could manage. So I drank and ate three malted milk tablets and a salt tablet, then had another drink. It helped a lot but I hoped Peewee hadn't noticed. She was busy unwinding clothesline-anyhow it was hard to see into a helmet.

I took Peewee's empty bottle off her back, making darn sure to close her outside stop valve first-there's supposed to be a one-way valve where an air hose enters a helmet but I no longer trusted her suit; it might have more cost-saving shortcomings. I laid the empty on the ground by a full one, looked at it, straightened up and touched helmets. "Peewee, disconnect the bottle on the left side of my back."

"Why, Kip?"

"Who's doing this job?" I had a reason but was afraid she might argue. My lefthand bottle held pure oxygen; the others were oxy-helium. It was full, except for a few minutes of fiddling last night in Centerville. Since I couldn't possibly give her bottle a full charge, the next best thing was to give her a half-charge of straight oxygen.

She shut up and removed it.

I set about trying to transfer pressure between bottles whose connections didn't match. There was no way to do it properly, short of tools a quarter of a million miles away-or over in Tombaugh Station which was just as bad. But I did have adhesive tape.

Oscar's manual called for two first-aid kits. I didn't know what was supposed to be in them; the manual had simply given USAF stock numbers. I hadn't been able to guess what would be useful in an outside kit-a hypodermic needle, maybe, sharp enough to stab through and give a man morphine when he needed it terribly. But since I didn't know, I had stocked inside and outside with bandage, dressings, and a spool of surgical tape.

I was betting on the tape.

I butted the mismatched hose connections together, tore off a scrap of bandage and wrapped it around the junction-I didn't want sticky stuff on the joint; it could foul the operation on a suit. Then I taped the junction, wrapping tightly, working very painstakingly and taping three inches on each side as well as around the joint-if tape could restrain that pressure a few moments, there would still be one deuce of a force trying to drag that joint apart. I didn't want it to pull apart at the first jolt. I used the entire roll.

I motioned Peewee to touch helmets. "I'm about to open the full bottle. The valve on the empty is already open. When you see me start to close the valve on the full one, you close the other one-fast! Got it?"

"Close the valve when you do, quickly. Roger."

"Stand by. Get your hand on the valve." I grabbed that lump of bandaged joint in one fist, squeezed as hard as I could, and put my other hand on the valve. If that joint let go, maybe my hand would go with it- but if the stunt failed, little Peewee didn't have long to live. So I really gripped.

Watching both gauges, I barely cracked the valve. The hose quivered; the needle gauge that read "empty" twitched. I opened the valve wide.

One needle swung left, the other right. Quickly they approached half-charge. "Now!" I yelled uselessly and started closing the valve.

And felt that patchwork joint start to give.

The hoses squeezed out of my fist but we lost only a fraction of gas. I found that I was trying to close a valve that was closed tight. Peewee had hers closed. The gauges each showed just short of half full-there was air for Peewee.

I sighed and found I had been holding my breath.

Peewee put her helmet against mine and said very soberly, "Thanks, Kip."

"Charton Drugs service, ma'am-no tip necessary. Let me tidy this mess, you can tie me and we'll go."

"You won't have to carry but one extra bottle now."

"Wrong, Peewee. We may do this stunt five or six times until there's only a whisper left"-or until the tape wears out, I added to myself. The first thing I did was to rewrap the tape on its spool-and if you think that is easy, wearing gloves and with the adhesive drying out as fast as you wind it, try it.

In spite of the bandage, sticky stuff had smeared the connections when the hoses parted. But it dried so hard that it chipped off the bayonet-and-snap joint easily. I didn't worry about the screw-thread joint; I didn't expect to use it on a suit. We mounted Peewee's recharged bottle and I warned her that it was straight oxygen. "Cut your pressure and feed from both bottles. What's your blood color reading?"

"I've been carrying it low on purpose."

"Idiot! You want to keel over? Kick your chin valve! Get into normal range!"

We mounted one bottle I had swiped on my back, tied the other and the oxy bottle on my front, and were on our way.

Earth mountains are predictable; lunar mountains aren't, they've never been shaped by water. We came to a hole too steep to go down other than by rope and a wall beyond I wasn't sure we could climb. With pitons and snap rings and no space suits it wouldn't have been hard in the Rockies- but not the way we were. Peewee reluctantly led us back. The scree slope was worse going down-I backed down on hands and knees, with Peewee belaying the line above me. I wanted to be a hero and belay for her-we had a brisk argument. "Oh, quit being big and male and gallantly stupid, Kip! You've got four big bottles and the Mother Thing and you're top heavy and I climb like a goat."

I shut up.

At the bottom she touched helmets. "Kip," she said worriedly, "I don't know what to do."

"What's the trouble?"

"I kept a little south of where the crawler came through. I wanted to avoid crossing right where the crawler crossed. But I'm beginning to think there isn't any other way."

"I wish you had told me before."

"But I didn't want them to find us! The way the crawler came is the first place they'll look."

"Mmm... yes." I looked up at the range that blocked us. In pictures, the mountains of the Moon look high and sharp and rugged; framed by the lens of a space suit they look simply impossible.

I touched helmets again. "We might find another way-if we had time and air and the resources of a major expedition. We've got to take the route the crawler did. Which way?"

"A little way north ... I think."

We tried to work north along the foothills but it was slow and difficult. Finally we backed off to the edge of the plain. It made us jumpy but it was a chance we had to take. We walked, briskly but not running, for we didn't dare miss the crawler's tracks. I counted paces and when I reached a thousand I tugged the line; Peewee stopped and we touched helmets. "We've come half a mile. How much farther do you think it is? Or could it possibly be behind us?"

Peewee looked up at the mountains. "I don't know," she admitted. "Everything looks different."

"We're lost?"

"Uh ... it ought to be ahead somewhere. But we've come pretty far. Do you want to turn around?"