Charles Prentiss: Now. So... er... paintings... in the style of John Sell Cotman, Tom Girtin, Turner... The great tradition of English watercolourists and by extension, therefore, your enemy is... painters who prefer to use acrylics? Um... help me out. Um... right. "A.H." They're all signed A.H. Er... That would be Alice? Agatha? Give me a clue.