Rockbridge County, VirginiaThe death record list is birth date as approximately 1787, but that would have been before he could have been born per parent's marriage.
Federal Census, in 1820 Federal Census - Rockbridge 1820.
Alexander listed as single, no wife.
Federal Census, in 1830 Federal Census - Rockbridge 1830.
Federal Census, in 1840 Federal Census - Rockbridge 1840.
Federal Census, in 1850 Federal Census - Rockbridge.
Virginia death, birth and burial index, in Alexander's Death 30 Jun 1857.
"Virginia Deaths and Burials, 1853–1912." Index. FamilySearch, Salt Lake City, Utah, 2010. Index entries derived from digital copies of original and compiled records.