Margaret Ormiston of Sutherland Who Married Robert Frater

Robert FRATER (son of John FRATER & Elizabeth MILLER) was born 1790 in Wooler, died 1.1.1854 Balnakeil. He married Margaret ORMISTON at Farr, Achness 17.12.1821.

I can find no details of Margaret's birth or parents. They had 9 children prior to her death in 1849. Robert worked for the Duchess of Sutherland, living in various places throughout Sutherland, including Farr, Creich, Durness and Balnakeil.

I would love to know who Margaret's parents were and a little about that family.