"United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MHCM-FPY : 12 April 2016), Carlos E Sanborn in household of Dearborn Sanborn, Michigan, United States; citing p. 22, family 168, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 552,183.