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- [S275] 1850 US Census - MO - Harrison Co.
1850 U.S. census, Harrison County, Missouri, population schedule, District 27, p. 430-B, dwelling 124, family 135, Hannible Harrison household; digital images, Ancestry (http://www.ancestry.com : accessed 19 Jun 2026); citing National Archives and Records Administration microfilm M432, roll 400.
- [S276] 1860 US Census - MO - Harrison Co.
1860 U.S. census, Harrison County, Missouri, population schedule, Clay, p. 562, dwelling 486, family 474, Hannible Harrison household; digital images, Ancestry (http://www.ancestry.com : accessed 19 Jun 2026); citing National Archives and Records Administration microfilm M653, roll 622.
- [S277] 1870 US Census - MO - Harrison Co.
1870 U.S. census, Harrison County, Missouri, population schedule, Clay, p. 51-A, dwelling 136, family 139, Hannibal Harrison household; digital images, Ancestry (http://www.ancestry.com : accessed 19 Jun 2026); citing National Archives and Records Administration microfilm M593, roll 778.
- [S278] 1880 US Census - MO - Harrison Co.
1880 U.S. census, Harrison County, Missouri, population schedule, Clay, enumeration district (ED) 288, p. 08-C, dwelling 141, family 146, Hannibal Harrison household; digital images, Ancestry (http://www.ancestry.com : accessed 19 Jun 2026); citing National Archives and Records Administration microfilm T9, roll 688.
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