A shudder of loathing ran through Clarence.

'Traitor!' he cried.

'Eh?' said the Mayor.

'If anybody had told me that a son of Tooting, nursed in the keen air of freedom which blows across the Common, would sell himself for gold to the enemies of his country, I would never have believed it. Well, you may tell your employers—'

'What employers?'

'Power A.'

'Oh, that?' said the Mayor. 'I am afraid my secretary, whom I instructed to bring you to this house, was obliged to romance a little in order to ensure your accompanying him, Mr Mulliner. All that about Power A and Power B was just his little joke. If you want to know why you were brought here—'

Clarence uttered a low groan.

'I have guessed your ghastly object, you ghastly object,' he said quietly. 'You want me to photograph you.'

The Mayor shook his head.