↑ "Illinois, County Marriages, 1810-1940," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:X25W-DH3 : 5 November 2017), Alex Mckay and Jannett Ralston, 1864; citing Boone, Illinois, United States, county offices, Illinois; FHL microfilm 1,914,102.
Find A Grave: Memorial #53435818 Find A Grave, database and images (https://www.findagrave.com : accessed 13 September 2018), memorial page for Janet Ralston McKay (1820–6 Nov 1882), Find A Grave Memorial no. 53435818, citing Scottish Cemetery, Caledonia, Boone County, Illinois, USA ; Maintained by Amelia Crombie-Christy (contributor 46861625). Note I believe she is connected to the wrong parents. William and Elizabeth were not married until 1822 and there are no baptism records of them as her parents.