For 10 points, name this English landscape painter, whose best-known work is The Hay Wain.
Edited letters by this artist were published by Charles Robert Leslie. his early works include one inspired by Claude Lorrain, Dedham Vale: Morning, and a painting of a subject that would appear in a later work, Flatford Mill. Other frequent subjects included Salisbury Cathedral, and his paintings set in the River Stour valley include The White Horse and a painting that depicts Willy Lott's cottage and the titular cart. For 10 points, name this English landscape painter, whose best-known work is The Hay Wain.
Edited letters by this artist were published by Charles Robert Leslie.
John {Constable}