‘Yes,’ she said listlessly. ‘What do you want?’

‘Cassandra, your brother Raphael is here.’

‘Cassie!’ shouted Raphael, running toward her.

The little girl raised her eyes slowly. ‘Hello, Raphael,’ she said dully.

Raphael stopped as though he had been struck.

‘Cassie!’ was all he could say. ‘Cassie, what’s the matter?’

‘Nothing. Nothing at all.’

Raphael was puzzled. There was something wrong.

‘Well, children,’ said Mechanus, ‘it must be nearly supper-time. Show Raphael to his room, Cassandra.’

Cassandra led the way through the stone-flagged hall of the tower to an elevator. They stepped in, and Cassandra pushed a button. The elevator rose swiftly.