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- [S328] Federal Census Record: Mercer Co., WV 1900 (Reliability: 3).
lists age as 18
- [S1071] West Virginia State Department of Health Death Certificate, #3881, Dist. No. 2853, Serial No. 29 (Reliability: 3).
lists age at time of death as 57
- [S1076] National Archives and Records Administration: Washington, DC, World War I Selective Service System Draft Registration Cards, 1917-1918, (Ancestry.com. World War I Draft Registration Cards, 1917-1918 [database on-line]. Provo, UT, USA: Ancestry.com Operations Inc, 2005.) (Reliability: 3).
lists date of birth as 28 October 1879, however, Granval does not appear in the 1880 Census
- [S1071] West Virginia State Department of Health Death Certificate, #3881, Dist. No. 2853, Serial No. 29 (Reliability: 3).
- [S1540] West Virginia. Mercer County., Mercer Co., WV Marriage Register, (Digital images. West Virginia Division of Culture and History, West Virginia Vital Research Records. http://www.wvculture.org/vrr/ : 2010.), marriage register, 1: 27, line 40, Shrewsbury-Worrell, 1876; accessed 3 Nov 2025. (Reliability: 3).
- [S329] Federal Census Record: Mercer Co., WV 1910.
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