The bulk of this collection consists of letters written to Stevens by family and friends. In particular, it highlights correspondence with his mother and siblings; his adopted son, Benjamin Chevallier; and European friends he made on his trips abroad, including the de Zubiaurre, Hanau, and Colas families. It also includes a few letters that Stevens wrote himself.

Also present is a collection of postcards, Stevens’ conversation notes, and some personal items, news clippings, and sketches.

There is also a large collection of photographs, mostly of friends and family, but also including some pictures of Stevens’ own artwork and/or work by artists he admired.