'I don't understand,' said Cyril.

'In the Past you may find it,' said the voice.

'I wish we MAY find it,' said Cyril.

The Psammead whispered crossly, 'Don't you understand? The thing
existed in the Past. If you were in the Past, too, you could
find it. It's very difficult to make you understand things.
Time and space are only forms of thought.'

'I see,' said Cyril.

'No, you don't,' said the Psammead, 'and it doesn't matter if you
don't, either. What I mean is that if you were only made the
right way, you could see everything happening in the same place
at the same time. Now do you see?'

'I'm afraid _I_ don't,' said Anthea; 'I'm sorry I'm so stupid.'

'Well, at any rate, you see this. That lost half of the Amulet
is in the Past. Therefore it's in the Past we must look for it.
I mustn't speak to the charm myself. Ask it things! Find out!'

'Where can we find the other part of you?' asked Cyril
obediently.

'In the Past,' said the voice.