Frederic Leighton to James McNeill Whistler: 'My dear...

Frederic Leighton to James McNeill Whistler: 'My dear Whistler, you leave your pictures in such a sketchy, unfinished state. Why don't you ever finish them?' James McNeill Whistler to Frederic Leighton: 'My dear Leighton, why do you ever begin yours?