It seems his father (another John Bristow, 1701-1768) sold Quidenham Hall to the Earl of Albemarle in 1762. See this link ....
http://www.origins.org.uk/genuki/NFK/places/q/quidenham/whit...And Bristow purchased Quidenham Hall from the Holland family in 1740 according to this link .....
http://www.quidenhamcarmel.org.uk/quidenham_history.phpHope this helps.