[2] She was also the author of several novels, children's books, and biographies, some of which were published under the name Susan Tweedsmuir.

[4] She was a daughter of Norman de L'Aigle Grosvenor (son of the first Lord Ebury) and his wife Caroline Susan Theodora Stuart-Wortley (a granddaughter of the first Lord Wharncliffe), and a cousin of the Dukes of Westminster.

The Buchans had four children, Alice, John, William, and Alastair, two of whom spent most of their lives in Canada.

[5] Her time as Vicereine of Canada is remembered for her energetic relief work.

She died at Burford, near Oxford, on 22 March 1977 aged 94 and was buried beside her husband in the churchyard at Elsfield.