'Please don't peel it,' said Teppic. 'The peel's the best part. Full of nourishing vitamins and minerals. Only I don't suppose you've heard about them, have you, they've only been invented recently,' he added, mainly to himself. 'I mean, within the last seven thousand years,' he finished sourly.

So much for time flowing past, he thought glumly. It might do that everywhere else, but not here. Here it just piles up, like snow. It's as though the pyramids slow us down, like those things they used on the boat, whatd'youcallem, sea anchors. Tomorrow here is just like yesterday, warmed over.

She peeled the grape anyway, while the snowflake seconds drifted down.

At the site of the Great Pyramid the huge blocks of stone floated into place like an explosion in reverse. They were flowing between the quarry and the site, drifting silently across the landscape above deep rectangular shadows.

'I've got to hand it to you,' said Ptaclusp to his son, as they stood side by side in the observation tower. 'It's astonishing. One day people will wonder how we did it.'

'All that business with the log rollers and the whips is old hat,' said IIb. 'You-can throw them away.' The young architect smiled, but there was a manic hint to the rictus.

It was astonishing. It was more astonishing than it ought to be. He kept getting the feeling that the pyramid was . . .

He shook himself mentally. He should be ashamed of that sort of thinking. You could get superstitious if you weren't careful, in this job.

It was natural for things to form a pyramid - well, a cone, anyway. He'd experimented this morning. Grain, salt, . . . not water, though, that'd been a mistake. But a pyramid was only a neat cone, wasn't it, a cone which had decided to be a bit tidier.

Perhaps he'd overdone it just a gnat on the paracosmic measurements?

His father slapped him on the back.

'Very well done,' he repeated. 'You know, it almost looks as though it's building itself.'

IIb yelped and bit his wrist, a childish trait that he always resorted to when he was nervous. Ptaclusp didn't notice, because at that moment one of the foremen was running to the foot of the tower, waving his ceremonial measuring rod.

Ptaclusp leaned over.

'What?' he demanded.

'I said, please to come at once, O master!'

On the pyramid itself, on the working surface about halfway up, where some of the detailed work on the inner chambers was in progress, the word 'impressive' was no longer appropriate. The word 'terrifying' seemed to fit the bill.

Blocks were stacking up in the sky overhead in a giant, slow dance, passing and re-passing, their mahouts yelling at one another and at the luckless controllers down on the pyramid top, who were trying to shout instructions above the noise.

Ptaclusp waded into the cluster of workers around the centre. Here, at least, there was silence. Dead silence.

'All right, all right,' he said. 'What's going . . . oh.' Ptaclusp IIb peered over his father's shoulder, and stuck his wrist in his mouth.

The thing was wrinkled. It was ancient. It clearly had once been a living thing. It lay on the slab like a very obscene prune.

'It was my lunch,' said the chief plasterer. 'It was my bloody lunch. I was really looking forward to that apple.'

'But it can't start yet,' whispered IIb. 'It can't form temporal nodes yet, I mean, how does it know it's going to be a pyramid?'

'I put my hand down for it, and it felt just like . . . it felt pretty unpleasant,' the plasterer complained.

'And it's a negative node, too,' added IIb. 'We shouldn't be getting them at all.'

'Is it still there?' said Ptaclusp, and added, 'Tell me yes.' 'If more blocks have been set into position it won't be,' said his son, looking around wildly. 'As the centre of mass changes, you see, the nodes will be pulled around.'

Ptaclusp pulled the young man to one side.

'What are you telling me now?' he demanded, in a camel whisper.[16]

'We ought to put a cap on it,' mumbled IIb. 'Flare off the trapped time. Wouldn't be any problems then . . .'

'How can we cap it? It isn't damn well finished,' said Ptaclusp. 'What have you been and gone and done? Pyramids don't start accumulating until they're finished. Until they're pyramids, see? Pyramid energy, see? Named after pyramids. That's why it's called pyramid energy.'