Correspondents include Alfred Stieglitz; Georgia O'Keefe; Louisa Calder (one original) and Alexander (Sandy) Calder; Bessie Breuer (originals) and her husband Henry Varnum Poor (some originals); Dudley Vail Talcott; Kurt and Arlette Seligman; Jean Lurcat; and Norman R. Eppink of Emporia. Majority of the correspondence, both incoming and outgoing, is photocopied.