I came across this thread and perhaps someone has encountered the family which I am interested in.
John McFadyen married Mary McLean on Nov. 22, 1831.  He lived in Acha at the time while she was at Grimsary.  The family lived in Grimsary and I am descended from their daughter Mary who married Hugh Young at Cambusnethan Parish Church on Dec. 9, 1864.
If anyone has any information about this family I would appreciate hearing from you.  While I have some information I am not confident of its accuracy.
Jim.