1804 engraved map of Ohio by Samuel Lewis, showing land divisions, settlements, and rivers.
1914 atlas by William C. Mills mapping Ohio’s mounds and antiquities.
1900 atlas by Martin Lutz featuring maps of Mercer County, U.S. land surveys, and biographies of leading citizens.
1888 atlas by B. N. Griffing detailing real property and maps of Mercer County, Ohio.