Aaron Siskind (1903-1991) was a major figure in the history of American photography. A leading documentary photographer who was active in the New York Photo League in the 1930s, Siskind moved beyond the social realism of his early work as he increasingly came to view photography as a visual language of signs, metaphors, and symbols--the equivalent of poetry and music. Through the forties and ifties, he developed new techniques to photograph details...