The portrait is of the English novelist, Margaret Louisa Woods (20 November 1855 – 1 December 1945). She died in Vine Cottage, her home in Thursley.
From Wikipedia:
She was born in Rugby, the daughter of the scholar George Granville Bradley, an academic and senior priest, who served as Dean of Westminster from 1881 to 1902. Her sister was the writer Mabel Birchenough. In 1879 she married Henry George Woods, who became President of Trinity College, Oxford, and Master of the Temple. They built Thessaly Cottage, on the ridge of Boars Hill above Oxford, one of the first brick houses to be established there, and stayed there until 1893. There were three sons. Margaret died at her home, Vine Cottage, in Thursley, Surrey. Her ashes are interred with her husband, at Holywell Cemetery, Oxford.
A great deal more information on her life can be found in Yellow Nineties 2.0: