It is organized into two sub-series. There is some BMC history discussed in this subseries, and it includes a transcription of an interview with Richards. The first is in chronological order, while the second is in alphabetical order, by correspondent. Most letters are signed and enclosures are usually kept with the correspondence. Business and personal correspondence are both present, with roughly three quarters being personal.
Arts education is a frequent theme throughout the correspondence.
The letters from Richards are duplicate copies kept by her and are very detailed and often intimate. Some of the largest files are those of her closest friends, among them Paulus Berensohn, Carolyn Bilderbeck, Remy Charlip, Molly Frances, Charity James, and Barbara Kazankis. Her dissertation, her lecture on Artaud given at the Living Theater in 1960, typescripts and drafts of her books, and other lectures and talks are also included. Most of these are complete texts, although occasionally there are only notes or drafts. The second sub-series is made up of Richards' poetry, while the third is manuscripts and lectures of others.