Montana-born New York commodity broker George Poindexter befriended Franz Kline, Jackson Pollock, Willem de Kooning and other rising stars of abstract expressionism and bought their works. His wife, Elinor, also became passionate about avant-garde American art, and in 1955, she opened the Poindexter Gallery on New York's West 56th Street. Together George and Elinor Poindexter assembled a collection of American modernist paintings. In the early 1960s,...