Hi Pergamond,
Not sure that R & C is the correct area, could it possibly be Sutherland?
According to scotlandsplaces, Bonar Bridge is in the Parish of Creich, Sutherland
A Will (SP)
Clark John
10/10/1889
Saddler and General Merchant, Bonar Bridge, d. 13/07/1889 at Bonar Bridge, testate
Dornoch Sheriff Court
SC9/36/7
Annie