The artificial collection contains over 800 photo postcards of California (excluding San Francisco) collected by the San Francisco
History Center, San Francisco Public Library. The postcards range in date from the early 1900s to 1950s. Collection includes
over 100 photo postcards of Yosemite National Park. Places represented are significant California buildings, businesses, and
hotels as well as many general views. Photo postcard photographers and publishers include Alexander Johnston (Zan), Piggott,
Pillsbury Picture (Pillsbury, Arthur Clarence), and Marsh-Garvin Co.