The Magcobar Photograph Collection consists of photographs and records relating to the Donovan family and the Magcobar clay plant in Zavalla, Texas. The photographs depict Allen T. Donovan, Bonnie Donovan, Richard Donovan, Vina Donovan, and Eva Berry Farley working at the plant or posing near digging equipment or clay pits. The non-pictorial materials document Zavalla plant history and other Magcobar facilities in Texas, Louisiana, and Canada.