Joe Haldeman SF Gateway Omnibus: Marsbound, Starbound, Earthbound
wanted to go farther, the dog had a collapsible booster antenna that went up ten meters, which we could leave behind as a relay.
    We didn't need it for that, but Paul clicked it up into place when we came to the edge of a somewhat deep crater he wanted to climb into.
    "Be really careful," he said. "We have to leave the dog behind. If we both were to fall and be injured, we'd be in deep shit."
    I followed him, watching carefully as we picked our way to the top. Once there, he turned around and pointed.
    It's hard to say how strange the sight was. We weren't that high up, but you could see the curvature of the horizon. The dog behind us looked tiny but unnaturally clear, in the near vacuum. To the right of Telegraph Hill, the pad where the John Carter had been raised to stand on its tail, waiting for the synthesizer to slowly make fuel from the Martian air.
    Paul was carrying a white bag, now a little rust-streaked from the dust. He pulled out a photomap of the crater, unfolded it, and showed it to me. There were twenty X's, with numbers from one to twenty, starting on the top of the crater rim, where we must have been standing, then down the incline, and across the crater floor to its central peak.
    "Dust collecting," he said. "How's your oxygen?"
    I chinned the readout button. "Three hours forty minutes."
    "That should be plenty. Now you don't have to go down if you—"
    "I do! Let's go!"
    "Okay. Follow me." I didn't tell him that my impatience wasn't all excitement, but partly anxiety at having to talk and pee at the same time. Peeing standing up, into a diaper, trying desperately not to fart. "Funny as a fart in a spacesuit" probably goes back to the beginning of space flight, but there's nothing real funny about it in reality. I'd taken two anti-gas tablets before I came out, and they seemed to still be working.
    Keeping your footing was a little harder, going downhill. And it had been some years since I'd walked with a wet diaper. I was out of practice.
    Paul had the map folded over so it only showed the path down the crater wall; every thirty or forty steps he would fish through the bag and take out a pre-labeled plastic vial and scrape a sample of dirt into it.
    On the floor of the crater I felt a little shiver of fear at our isolation. Looking back the way we'd come, though, I could see the tip of the dog's antenna.
    The dust was deeper than I'd seen anyplace else, I guess because the crater walls kept out the wind. Paul took two samples as we walked toward the central peak.
    "You better stay down here, Carmen. I won't be long." The peak was steep, and he scrambled up it like a monkey. I wanted to yell, "Be careful," but kept my mouth shut.
    Looking up at him, the sun sinking under the crater's rim, I could see Earth gleaming blue in the ochre sky. How long had it been since I thought of Earth, other than "the place where school is"? I guess I hadn't been here long enough to feel homesickness. Nostalgia for Earth—crowded place with lots of gravity and heat.
    It might be the first time I seriously thought about staying. In five years I'd be twenty-four and Paul would still be in his early thirties. I didn't feel as romantic about him as I had on the ship. But I liked him and he was funny. That would put us way ahead of a lot of marriages I'd observed.
    But then how did I really feel about him? Up there being heroic and competent and, admit it, sexy.
    Turn down the heat, girl. He's only twelve years younger than your father, Probably sterile from radiation, too. I didn't think I wanted children, but it would be nice to have the option.
    Meanwhile, he would be fun to practice with.
    He collected his samples and tossed the bag down. It drifted slowly, rotating, and landed about ten feet away. I was enough of a Martian to be surprised to hear a faint click when it landed, the soles of my boots picking the noise up, conducted through the rock of the crater floor.
    He worked his way down slowly, which was a relief. I was

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