Looking for Info on John Hunteand Agnes Macfarlane

John Hunter maried Agnes Macfarlane on 14th jan 1837,they had two children that Iknow of Cathrine born 17th feb 1839,Mary born 21/12/1837 Agnes later remarried,and gave birth to another 6 children with her 2nd husband Peter Haggart.
I have found Mary Hunter married Daniel McNab & Cathrine married Angus Cameron
It would be great if I could find details of Johns parents & also Agnes