Likely married around 1865-1867, based on data from 1880 Census and birth of what appears to be their first born in or around 1867.
Sources
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M8L4-NXX : 29 July 2017), Prince Morgan, 1880; citing enumeration district ED 1, sheet 374A, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d), roll 0133; FHL microfilm 1,254,133.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M3FV-J5K : accessed 14 August 2019), Prince Morgan, Cartersville city Ward 1-2, Bartow, Georgia, United States; citing enumeration district (ED) 4, sheet 2B, family 29, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,179.
"Illinois Deaths and Stillbirths, 1916-1947," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:N3ZS-VBM : 10 March 2018), Prince Morgan in entry for Samuel Morgan, 29 Oct 1934; Public Board of Health, Archives, Springfield; FHL microfilm 1,907,324.
"Illinois Deaths and Stillbirths, 1916-1947," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:N34Z-RJ6 : 10 March 2018), Prince Morgan in entry for Anna Wiley, 18 Jul 1931; Public Board of Health, Archives, Springfield; FHL microfilm 1,893,068.
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