[S4188] Illinois Secretary of State, "Illinois Statewide Marriage Index, 1763-1900," database, Illinois State Archives (http://www.cyberdriveillinois.com/departments/archives/archives.html : accessed 27 March 2014), entry for Joseph J. Arthur-"Agna" [Agnes] Walker, Madison County, 5 January 1851; citing Madison County, Marriage Book 6:94, license no. 746.