Consists predominantly of letters from the period after Brainin settled in North America. The correspondence includes letters from the famous and the obscure in all parts of the Jewish diaspora, plus Palestine. A majority are written in Hebrew and thus document the renaissance of Hebrew as a modern language. Many of the letters were accompanied by manuscripts submitted to Brainin as editor of various Hebrew publications (manuscripts located in Gr. I). Of great interest in this group is the collection of letters from Chava Shapiro to Brainin during their long relationship (Box t). Correspondence is arranged alphabetically in the Hebrew alphabet (Boxes a-t) and then in the Roman alphabet for all other languages (Boxes s-x). The last box in the Group (Box y) contains Brainin family correspondence.

The papers represent the scope of Brainin’s life endeavours as writer, editor, biographer, critic, translator, lecturer, Zionist and one of the founders of the Jewish Public Library. The Fonds is divided into five major series: Literary and editorial activities, Biography and criticism, Correspondence, Special Collections, and the records of the Jewish Public Library Archives Committee.