A large series consisting of correspondence between Sachar and
individuals, though some organizations and subject files are also
included. Recurrent topics in the correspondence are Hillel and B'nai
B'rith administrative matters and finances, social and political issues, and the status of refugee students in the early 1940s, as well as files on Sachar's resignation from Hillel and the responses he received. Notable names include Albert Einstein, Bernard Heller, Max Kadushin, Seymour Martin Lipset, and Eleanor Roosevelt.