 He was very wealthy and purchased back the Barony of Stevenston from the Earl of Eglinton in 1656.He died in 1676 and his son only outlived him by two years and because his daughter could not inherit, the land passed through the male line to her cousin, Robert Cunninghame.In January 1678 Robert Cunynghame, apothecary / druggist in Edinburgh, is stated to be the heir to Anne, daughter of Sir Robert Cunynghame of Auchenharvie.