Joan Mitchell (1926-1992) was a pre-eminent painter of the Abstract Expressionist generation, and, along with Lee Krasner and Helen Frankenthaler, one of the few female painters of her era to gain critical and public acclaim. She came to attention in the early 1950s but only recently has her work won the recognition it truly merits. Her large-scale gestural paintings register a great acuity of feeling and tremendous vitality. Leaving America documents...