 The decisive moment for the medium at Princeton came in 1971 when David Hunter McAlpin, Class of 1920, made a donation of his collection of 457 prints.McAlpin was a friend and patron to two generations of American photographers, donating significant representations of the work of Stieglitz, Paul Strand, Charles Sheeler, Ansel Adams, Wynn Bullock, Imogen Cunningham, Edward Weston, and Eliot Porter, among others.McAlpin also established a fund which has enabled, over time, the purchase of some 400 photographs, including work by Hill & Adamson, László Moholy-Nagy and William Henry Fox Talbot.