Janet Tietjens, daughter of Eunice and Paul Tietjens, graduated from the University of Wisconsin, married Chester Hart, and had one daughter, Jennifer Hart (Dougall). The family settled in Oak Park, Illinois, and Janet T. Hart then pursued a career as a photographer, in which she exhibited, taught, judged and wrote about photography.

The Janet Tietjens Hart Material is mainly outgoing correspondence from Janet Tietjens Hart to her mother, Eunice Tietjens, ca. 1911-1943. Also incoming correspondence and miscellaneous material concerning Hart's photographic career.