On 27 September 1747 , he married Elizabeth Sanderson in County Durham , England .
Agnew was born in 1719 in England to Major James Agnew , 7th Dragoons , and Margaret Wilkinson .
On 27 September 1747 , Agnew married Elizabeth Sanderson in County Durham , England .
Agnew was born in 1719 in England to Major James Agnew , 7th Dragoons , and Margaret Wilkinson .