That Henry Heth Sr. married Agnes McMachan  around 1749 in Frederick County, Virginia. According to various records, Heth Sr. acquired land near Fort Pitt (modern day Pittsburgh) and when the Revolutionary War broke out, he was a captain of an independent company stationed near Fort Pitt.
Henry Heth Sr. tied the knot with Agnes McMachan in approximately 1749 in Frederick County, Virginia. Historical records indicate that Heth Sr. acquired property close to Fort Pitt (now Pittsburgh) and during the outbreak of the Revolutionary War, he commanded an independent company stationed near Fort Pitt.