Beatrice Violet Mary Mostyn was the daughter of Major Hon. George Charles Mostyn and Mary Monk and the second wife of Sir Charles Rivers Wilson (b. 1831), GCBG, CB, who had been Royal commissioner for the Paris exhibition of 1878.
She was a sculptress. She is referred to in JW's correspondence about 1899.
Who's Who, 1898, London, 1898; Times, London, 21 April 1925, p. 1.