In 1941 they visited the gallery of Alfred Stieglitz, where Diane learned about photographers such as Mathew Brady, Timothy O'Sullivan, Paul Strand, Bill Brandt, and Eugene Atget.[1]:129[16] In the early 1940s Diane's father employed them to take photographs for the department store's advertisements.[6] Allan was a photographer for the U.S. Army Signal Corps in World War II.[16]