Official correspondence, notes, and instructions received while serving as U. S. Minister to France and Secretary of War; also official documents of the Michigan Superintendency of Indian Affairs, 1819-1831, and the Office of Indian Affairs, 1814-1817 and 1822-1829, relating in part to Cass's work in negotiating land treaties with the Indians of the Michigan Territory.
The microfilm was acquired by Professor Nelson Vance Russell in the course of his research on the life of Lewis Cass. The originals of the records are in the National Archives and Records Administration. The files have been arranged by record group number which correspond to the various departments and agencies with whom Cass was associated as territorial governor, as diplomat, or, in the case of the War Department, as Secretary. The series in the collection are: United States Minister to France, United States Secretary of War, Michigan Superintendency of Indian Affairs, and United States Office of Indian Affairs. Cass's work with the Indians as governor of the Michigan Territory is documented in these last two series.