'You have the grand gift of silence, Watson,' said he. 'It makes you quite invaluable as a companion.'

'I think, Watson, that you are now standing in the presence of one of the most absolute fools in Europe. I deserve to be kicked from here to Charing Cross.'

'Crime is common. Logic is rare.'

'Data! data! data!' he cried impatiently. 'I can't make bricks without clay.'

'If I claim full justice for my art, it is because it is an impersonal thing – a thing beyond myself. Crime is common. Logic is rare. Therefore it is upon the logic rather than upon the crime that you should dwell. You have degraded what should have been a course of lectures into a series of tales.'