Douglass, Robert. The Baronage of Scotland: Containing, An Historical and Genealogical Account of the Gentry of that Kingdom. (London: Cadell & Davies, 1798), Page 248, 249.
XX. Alexander Sinclair of Roslin, who married Jean, daughter of Robert seventh lord Semple, by whom he had three sons and three daughters, who all died young except his son, William Sinclair XXI.
Page 558 - Jean, married to Alexander Sinclair of Roslin, and was mother of William Sinclair of Roslin, the last of that ancient family, who died in 1778, aged seventy-eight.
XX. Alexander Sinclair of Roslin, who married Jean, daughter of Robert seventh lord Semple, by whom he had three sons and three daughters, who all died young except his son, William Sinclair XXI.
