Free Strata by Terry Pratchett Page B

spend their last hours in a blacked-out ship with any hungry shand that might be aboard.
    The new orbit took them past the disc’s moon, no longer shining and obviously invisible in the disc’s day sky. They saw that one hemisphere was black.
    ‘Phases,’ said Kin. ‘Wobble the moon on its axis and you get phases.’
    ‘Who does the wobbling?’ asked Marco.
    ‘I don’t know. Whoever wanted this thing to look like Earth, from the surface. And don’t look at me like that – I’ll swear this wasn’t built by humans.’
    She spoke to them about artificial worlds – rings, discs, Dyson spheres and solar tunnels.
    ‘They don’t work,’ she said. ‘That is, they’re vulnerable. Too dependent on civilization. And there’s too many things to go wrong. Why do you think the Company terraforms worlds when there are cheaper alternatives? Because planets last, that’s why. Through anything.
    ‘And I’m certain this wasn’t built by Spindles. Planets were important to them. They had to feel the strata below and the unlimited space above. Somehow they could sense it. Living on something like this could drive them out of their skulls. Anyway, they died out four million years ago at least, and I’m positive that this thing isn’tthat old. It must be all machinery just to keep going, and machines wear out.’
    ‘There’s cities down there,’ said Marco, ‘in the right place, too. If this was Earth.’ He looked up. ‘Okay, Kin, you’ve been dying to tell us. What did hit us back there?’
    ‘Was the hole on the ecliptic?’
    Marco leaned over and played with the computer terminal for a few seconds. ‘Yes,’ he said. ‘Is it important? The sun was well below us.’
    ‘We were pretty unlucky. I think we were hit by a planet.’
    ‘That was my thought too,’ said Silver gravely, ‘but I did not like to say anything in case I was thought a fool.’
    ‘Planet?’ asked Marco. ‘A planet landed on the ship?’
    ‘I know it’s usually the other way around, but I think I’m beginning to grasp the workings of this system,’ replied Kin. ‘There’s a fake sky, so there’s got to be fake planets. Their orbits must be something to see. If it’s really supposed to look like an Earth sky they’d have to be retrograde sometimes.’
    ‘I was wrong,’ said Marco. ‘We should have started for home. We could have rigged up the sargo and taken turns to wake up. Two thousand years isn’t all that long. I don’t know what agency told Jalo I was the man for the job, but he’s owed his money back.’
    ‘Still, the view’s good,’ said Kin.
    The ship was passing under the disc again. And again there was the flash of green fire as, for a few seconds, the sun shone through the waterfall around the disc.
    Something hit them – again.
    It wasn’t a planet. It was a ship, and most of it was still hanging in the rearward aerial array when Marco had fought the spin it gave them.
    Kin went out this time, and she steadied herself on an aerial stump as she looked at the frosted wreckage.
    ‘Marco?’
    ‘I hear you.’
    ‘It’s made one hell of a mess of the antennae.’
    ‘I have already deduced that. We are also losing air. Can you see the leak?’
    ‘There’s fog damn near everywhere. I’m going to take a look.’
    They heard her boots clump around the hull, and then there was a silence so long that Marco shouted into the radio. When Kin spoke, she spoke slowly.
    ‘It is a ship, Marco. No, wrong word. A boat. A sailing boat. You know, like on seas.’
    She looked across at the fire-rimmed disc.
    A waterfall pouring over the edge of the world.
    The mast was broken and most of the planking had been whirled away by the force of the impact, but enough rope had held together to make it obvious the boat had a passenger.
    ‘Marco?’
    ‘Kin?’
    ‘It had a passenger.’
    ‘Humanoid?’
    Kin growled. ‘Look, it went over the waterfall and then into vacuum and then hit the ship! What sort of description do you