Overview: Papers chiefly relating to Ehrmann's involvement in the Sacco-Vanzetti case as junior counsel for the defense and his research and writings (1927-1969) on the case. Includes much correspondence (1915-1965) with Felix Frankfurter; letters (1920-1927) written by Nicola Sacco and Bartolomeo Vanzetti to various persons; material pertaining to Ehrmann's participation with the Massachusetts Commissions on Capital Punishment and on Unemployment, the Massachusetts Judicial Council, the Massachusetts...