Hello TamPepper,
Andrew Roger/Rodger & Kathrine Nicol are my 5xG.Grandparents, descended from their youngest child, Margaret, b 12th March 1779 at Mountmirrygogue, Forgan.
Margaret married John Rodger, son of John Rodger & Margaret Berrie/Berry, on 3rd Dec, 1799 at Leuchars, Fife. Margaret & John lived at Blebo Mills, Kemback (1841 Census) then Moonzie Mill, Leuchars (1851 Census). Margaret Rodger died 12th June 1858 at Moonzie Mill. (Daughter of Andrew Rodger (Farmer) & Catherine Rodger ms Nicol) John Rodger, miller & farmer at Moonzie Mill, died there on 7th Nov, 1858. (Son of John Rodger (Ploughman) & Margaret Rodger ms Berry)
John & Margaret's children named in his Will are: Thomas Rodger, miller at Moonzie Mill (married to Janet Buttercase). Peter Rodger, miller at Seggie Distillery (married to Elisabeth Smith). David Rodger, miller at Nydie Mill, then Garpit Mill (married to Elizabeth Hain). James Rodger, ploughman, residing at Moonzie Mill (married to Elisabeth Carmichael). Margaret Rodger, wife of John Wannan, Dairsie Bridge. Ann Rodger, wife of John Melville, Lucklawhill. Late daughter Catherine Rodger, spouse of John Henderson, Glasgow. Catherine's 1/7th share to be equally divided between her children.
Sons John b 1800 & Andrew b 1811, must have died without issue before John wrote his Will in 1856. Daughters Janet b 1815, d 1850. Mary b 1821, d 1837. (Margaret, John & daughter Janet, maybe others, are buried in Leuchars Churchyard. Still to find Headstone.)
Headstone for Kathrine Rodger ms Nicol is in Balmerino Churchyard between Balmerino & Kirkton. M.I. in beautiful script is: "This Stone was erected by Andrew Rodger in Memory of his Spouse, Kattrin Nickil who Departed this life February Th? 1794 aged 64 years."
Can't make out exact date. It could be "The" followed by a number or an abbreviation for Third or Thirteenth. Andrew's name has not been added.
I've not been able to find Mountmirrygogue or anything like it on old maps, but most other places mentioned can be found on this OS 25 Inch, 1892-1905 Map.
http://maps.nls.uk/geo/explore/#zoom=16&lat=56.4218&lon=-2.9487&layers=168 At left of screen, check that Scotland shows in 1. Select a category box. (Drop-down menu) Change maps using the 'drop-down menu' in 2. Select a map/map series box. Slide the Blue dot on left of screen to get an up to date Satellite over-view or, click on blue 'Side by Side" at top of screen to make comparing easier. Love these maps.
Sorry I can't help with Mountmirrygogue.
Regards, Dod.