I would love any information I can get about John Dempster and his wife Jennet Cooper/Cowpper, born c. 1791 and 1794, respectively; married 27 Jan 1821 in Barr by Girvan, Ayrshire (according to IGI). The last entries I find for them are in the 1851 Scotland Census.
Also, Jennet's parents, John Cooper/Cowpper and Agnes Cathcart, married 17 Feb 1787 (also according to IGI). Agnes born c. 1761, and was living with John and Jennet Dempster in the 1841 census. No further information about John.
I don't have information concerning John Dempster's parents, but his first two sons were Robert and John, and first two daughters Agnes and Jane.