Consists of correspondence, speeches, photographs, clippings and memorabilia relating to his activities as a lawyer and as a member of the House of Commons in the Parliament of Canada representing Montreal-Cartier, 1950-1963; includes material relating to Canadian immigration policies, German rearmament, humane slaughtering, and citizen reactions to these issues; correspondence with the members of the Israeli Parliament, and correspondence and speeches relating to his numerous activities in communal and Jewish affairs in general and Zionist organizations and The ORT in particular. Includes personal writings and memoirs in typescript and published material by and about Leon Crestohl. The collection also contains correspondence in English and Yiddish with members of the Crestohl family, primarily his mother Rose (Weitzman) Crestohl, 1926-1941, and published and manuscript material, both original and copies, relating to the career of his father Hyman Meyer Crestohl, 1904-1921.