Correspondence consists of three autograph letters, signed, to Pemberton from Alfred Stieglitz and four autograph letters, signed, from Georgia O'Keeffe. Stieglitz's letters, which date from 1926 and 1928, mention Charles Demuth, [Marsden] Hartley, and [John] Marin, among other topics. O'Keeffe's letters, which date from 1951 through 1960, concern personal matters, such as a visit.