'Do you mean to tell me that that man came here and sat beside me for the best part of half an hour and that I didn't detect the imposture?
Alloa must be out of his mind.' 'Don't you see the cleverness of it ?' I said.

'You were too interested in other things to have any eyes.

You took Lord Alloa for granted.

If it had been anybody else you might have looked more closely, but it was natural for him to be here, and that put you all to sleep.' Then the Frenchman spoke, very slowly and in good English.
'The young man is right.

His psychology is good.