From Watten the B870 runs (1) generally north/northeast to the B876 near Kirk and (2) generally west to a crossroads with the A9 at Mybster, then to Westerdale, and then generally north to Glengolly.
Major John Fairfax-Blakeborough O.B.E., M.C. (b. Guisborough 16 January 1883; d. Westerdale 1 January 1976) a.k.a. "Jack" was an author, folklorist and writer, and a man of many parts.
It was designed by Thomas Henry Wyatt and originally built as a shooting lodge, mainly for grouse shooting in the late summer and autumn.