You may already know that John Anderson died 22 March 1883 at Cambeg and is buried at Achness. Janet, died 10 March 1908 at Mudale and is buried with John. The only other thing I can add is that in the 1881 census John and Janet were at the Grumbeg Shepherd's House in Farr. Mary, Thomas, Martha and Jessie were there with their parents.
Hope this helps.
Christine