"described in a novel by the daughter of John Buchan"

 John Buchan, 1st Baron Tweedsmuir (1875-1940), was a Scottish novelist and politician, best known for his adventure novel The Thirty Nine Steps, published in 1915.

His daughter,  Alice Fairfax-Lucy (1908-1993), was a writer whose works include A Scrap Screen (1979) and Mistress of Charlecote (1983), but there is no record on the internet of any earlier works.