S. G. Tallentyre

http://id.loc.gov/authorities/names/n90683489

Evelyn Beatrice Hall (28 September 1868 – 13 April 1956),[1][2][3][Note 1] who wrote under the pseudonym S. G. Tallentyre, was an English writer best known for her biography of Voltaire entitled The Life of Voltaire, first published in 1903. She also wrote The Friends of Voltaire, which she completed in 1906.

wikipedia accessed 10/23/2017