'Not at all,' replied Clarence, courteously. 'No doubt it is all for the best.'

'Indeed?' said the other, with a touch of asperity. 'If you really want to know, I am probably as handsome a man as there is in London. But my mission is one of such extraordinary secrecy that I dare not run the risk of being recognized.' He paused, and Clarence saw his eyes glint through the holes in the mask as he directed a rapid gaze into each corner of the library, 'Mr Mulliner, have you any acquaintance with the ramifications of international secret politics?'

'I have.'

'And you are a patriot?'

'I am.'

'Then I can speak freely. No doubt you are aware, Mr Mulliner, that for some time past this country and a certain rival Power have been competing for the friendship and alliance of a certain other Power?'

'No,' said Clarence, 'they didn't tell me that.'

'Such is the case. And the President of this Power—'

'Which one?'

'The second one.'