The bulk of correspondence is between Blumenschein, his wife Mary, and his daughter Helen. Mary's correspondence discusses domestic life, Blumenschein's artistic career, the Taos community, relationship issues, travel, and financial matters. Correspondence with Helen is about school, domestic life, travels in Europe, and discussion of art, movies, and books. Blumenschein sometimes refers to Helen by the nickname of "Bill." Helen's letters sometimes contain small sketches.

Found are letters from magazines, publishers, museums, galleries, and patrons that record the sale, exhibition, and publication of Blumenschein's artwork. Correspondence from sports organizations documents Blumenschein's interest and participation in athletics. World War I era correspondence is with the Committee of Public Information, the Treasury Department, the Salmagundi Club, and the Aide de Camps of military bases in Kansas and New Mexico.

Of special interest in this series are an 1891 letter from evaluating Blumenschein's art submission, a letter from General John Pershing in regards to Blumenschein's portrait of Pershing, and a letter from Blumenschein to "a." discussing the conflict between artistic pursuits and Blumenschein's personal life. Also found are a few letters from artists and writers, including William Glackens, Walt Kuhn, Ward Lockwood, Booth Tarkington, and a long letter from Cass Gilbert.

This series has been scanned in its entirety.