"United States Census, 1880," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M6XW-774 : accessed 09 Aug 2012), Benj. F. Mashburn in household of John D. Cowen, Green, Hickory, Missouri; citing sheet 503A, family 3, NARA microfilm publication T9-0690.
It may be possible to confirm family relationships with Henry by comparing test results with other
carriers of his ancestors' Y-chromosome or mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Henry: