“William Armstrong son of the above [Armbrose [sic] Armstrong & Mary his wife] was born Augst. 9th 1768.” [Armstrong family Bible at the Virginia State Archives, Acc. 27094]

William Armstrong was not mentioned in the will of his father, dated on 28 February 1768 and proved on 21 November 1768. [Essex County, Virginia, Will Book 12, pages 321–322.]