(1) W. Preston Haynie, Records of Indentured Servants and of Certificates of Land, Northumberland County, Virginia, 1650-1795 (Bowie, Maryland: Heritage Books, 1996), quoting OB 1652-65, 193.
(2) Eric G. Grundset and Patricia Law Hatcher, Richard Omohundro of Westmoreland County, Virginia, The American Genealogist, Vol. 82, No. 4 (Oct 2007): 241-249.