I led her up the side of the Chamberpot, a tattered rimwall that stands next to Windhome. Sarge called it the Devil's Pisspot, but the official mapmakers wouldn't use that. The Chamberpot's rim has cracks that lead to Windhome, and I was sure nobody knew about them.

It was tricky climbing the side of the hill, and if you run too hard, you use a lot of air. We scrambled up the steep sides of the crater to the top, then down into the bowl. There was a ledge just inside the rim. It dropped off sheer for a hundred meters on our right, and it wasn't very wide. Until I watched her two-step along a section not much wider than my foot, I worried about Erica. Then I worried about myself.

I couldn't talk to her because the cops might be listening. I wondered if they'd heard Sarge's message to me. If they had they'd be looking for us, but they wouldn't know in what direction I'd been coming. There's a lot of desolate area around Windhome. I decided we were safe for the moment.

At the end of the ledge there was a crack through the rimwall. It was just wide enough to get through. Once inside it we were in deep shadow, but even through the dust we could see stars out above us like night. Then we were looking down on Windhome.

The station was in ruins. All the domes were cracked open, and the air-lock doors had been blown off their hinges.

There were more explosions as we stood watching. We couldn't hear them, of course, but we could see dust blow out of openings, and one of the tunnels collapsed. I stood in a boiling rage, trying to decide what to do. Mostly I wanted to kill people. A lot of them.

A group filed out of the main entrance. I had brought the binoculars from the tractor, and I could see them clearly: Federation Marines, carrying rifles. Seven of them had slugthrowers, and another had a big powerpack and laser rifle. After a short interval two more came out. One of them was Sarge. I could tell from his walk. They had him in handcuffs, but he was alive!

I grabbed Erica and pointed. She nodded. Then she held up her belt radio and pointed to the frequency dial. It took me a moment to catch on - I thought she wanted to talk, which was stupid of me. She knew better. When I tuned the receiver to the frequency she showed me, I heard voices.

"Where is he, Wechsung?"

"Go to hell."

"Look, we know your tractor is missing. Where did he go?"

"Get dorked."

One of the men hit Sarge with his rifle butt. I heard Sarge grunt, then he said, "Bielenson, you were a slimy bastard when I was in the service. You haven't changed."

"Maybe not. Take a good look, Wechsung. You men, get a lot of photos of this place. We'll show these farmers what happens to rebels. They'll straighten up."

I put my helmet against Erica's. When they touched we could talk without radios. "We've got to do something!"

"Hold on, my muscular friend," she said. "What will happen if you go charging down there?"

"Yeah." They had rifles and we had knives. There were at least ten of them, probably more in their tractors, and two of us. Three if we counted Sarge, but he was handcuffed.

"Gary, I know how you feel, but the best thing we can do is get back and tell Dad. And you've got your orders, mister. Sarge told you to alert the Rim.

She was right, but I didn't like it. I stood there trembling with helpless rage. They started boarding the three tractors. Two of them pushed Sarge into the small one and got in after him. "We could follow them," I said.

"On foot? Don't be an idiot."

"Varadd. Rogers," the radio said. "Get inside and stay out of sight. When that kid shows up, grab him."

"Sir. How long will we be here, major?"

"I'm leaving you air for two days. We'll be back for you before sundown tomorrow. just now we've got other work to do."

"Sir." The marine sounded unhappy about being left there.

"Load up and move out."

There was a babble of voices, and the rest of them got into the tractors. They started up, the two big tractors turning eastward toward Hendrix' station. The small one with Sarge and two marines turned west onto the Hellastown road.

"Come on," Erica said. She pulled away from me and ran back through the crack. For a moment I didn't move. I wanted to see what happened to Sarge, but she was right; we couldn't follow tractors on foot. By running away from me she kept me from doing something stupid. I ran after her.

We dashed along the ledge inside Pisspot's Rim. She was much faster than I on that narrow ledge, and she got a long way ahead. Then she was over the top. I caught up to her on the way down. Going down was easy - a twenty-foot drop was nothing. I had to be careful, though, because for the same speed you've got the same momentum on Mars as on Earth, you just weigh less. Still, I took that slope like it was a giant staircase. There was dust on the road below, and the faint marks of tractors.

We crossed the road and ran to Aunt Ellen. When we got inside, I brought the pressure up so we could talk.

"They're going to Ice Hill," she said. "They'll arrest my fatherl And Mom, too, maybe everyone there -"

"If they mean to blow up Ice Hill the way they did Windhome, they'll have to take everybody."

"We've got to warn them!"

"Yeah." I thought about the tracks I'd seen on the road. "But we've only got line-of-sight communications and they're ahead of us on the road. Just how do we warn them?"

Erica looked at the map, then pointed. "Take us out into the Basin. Right there."

She pointed at a rise about a kilometer from where we'd hidden Aunt Ellen. It was straight away from the Rim, not in the direction either of the Federation groups had gone. I thought of the tractor with Sarge in it getting away toward Hellastown, and the other two approaching Ice Hill. "Why?"

"Just do it. I'll tell you on the way."

"All right." I started the tractor and began picking a way through the boulder fields. There was no road or track. The map had been made by satellite photograph; I doubt that any human had ever been this way before. "Okay, why?"

"Because it will be in line of sight to Ice Hill. I think. It looks high enough."

"Dust is pretty thick -"

"If we can't get through with the photophone we'll use the radio." - "All right." I tried for more speed, but there were pits and rocks everywhere, and the dust made it hard to see. When summer comes, the dry ice on one polar cap boils off rather than melting-and blows all the way to the opposite pole. That raises big winds in Hellas. "One good thing," I said. "There's so much dust that they'll never see us out here. We can't be stirring up enough more to matter."

It took a good half hour to make that one kilometer. The hill she'd indicated was a mound about 250 meters high, a big bubble that had formed when Hellas was a lava field a billion years ago. When we reached the top, we were above a lot of the dust storm. I turned the telescope onto the Rim east of us, and searched for Ice Hill.

"There it is," I said. "I can just make out the photophone target."

Not all tractors have talking-light units, but Sarge kept Aunt Ellen better equipped than most Rimrats can afford. The sight was built into our telescope. I trained it onto the white photophone target at the top of Ice Hill, then used the joystick to get a precise adjustment. The system uses a modulated laser beam and has to be aimed just right. The advantage is that nobody can listen in unless they're in the exact line of sight, and you can see along that.

"Ice Hill, Ice Hill, Ice Hill. Mayday. Answer by photophone only. We are on Hill 252, Basin Sector Greeneight. Mayday." Erica said that several times. We waited.

"Sis! That you? I can hardly hear you."

"Perry, get Dad. Quickly."