"United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M85D-VSG : 4 April 2020), Jacob Harbough, Moultrie county, Moultrie, Illinois, United States; citing family 37, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).
"Illinois, County Marriages, 1810-1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KFKX-N78 : 4 November 2017), Jacob Harbaugh and Polly Ohair, 12 Feb 1829; citing Edgar, Illinois, United States, county offices, Illinois; FHL microfilm 1,301,880.