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- [S2534] Minnesota, Fillmore County, FCR: Fillmore Co., MN 1880, (http://www.ancestry.com: National Archives and Records Administration, 1999), T9, roll 619, Carimona, enumeration district (ED) 79, p. 361B, dwelling 55, family 55, James O. Barber, accessed 3 Dec 2025 (Reliability: 3).
- [S2538] South Dakota, Day County, FCR: Day Co., SD 1900, (http://www.ancestry.com: National Archives and Records Administration, 2004), T623, roll 1549, Highland, enumeration district (ED) 122, sheet 7A, p. 159, dwelling 109, family 110, James W. Walton, accessed 9 Dec 2025 (Reliability: 3).
notes age as 36, born Jan 1864.
- [S2539] South Dakota Department of Health, South Dakota, U.S., Death Index, 1879-1955, ((http://www.ancestry.com : 2004)), accessed 11 Dec 2025), James O. Walton, 1947, Walworth County; citing certificate no. 237290. (Reliability: 3).
- [S1241] Find A Grave, Find A Grave, ((http://www.findagrave.com/)), accessed 11 Dec 2025), memorial page for James O Walton (1864–1947), Find a Grave Memorial ID 216083790; citing Greenwood Cemetery, Mobridge, Walworth County, South Dakota, USA; Maintained by Maxine White (contributor 48878838). (Reliability: 3).
- [S2544] FamilySearch, Minnesota, U.S., Marriages Index, 1849-1950, ((http://www.ancestry.com : 2011)), accessed 12 Dec 2025), Walton-Oleson, 1887, Fillmore County; citing FHL Film Number 1316805. (Reliability: 3).
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