The photo above shows Mary Ann Elizabeth Thomas, née Quartly (1866–1943) on the left, and Irza Vivian Geraldine Britton, née Thomas (1866–1959) on the right. It was taken in about 1890, and the photo below obviously dates from the same period. The daughter of Samuel Thomas junior of Redditch (son of Samuel Thomas the needle and fish-hook manufacturer), Irza was born in Paris, France, and in her later life lived at 38 Saville Street (later to become 11 Hanson Street), Marylebone, and 66 Tufnell Park Road in the Borough of Islington. She was the mother of the working-class writer Lionel Britton (1887–1971).
(Many thanks to Janet Adcock for providing these images via Robert Hughes, who doesn't provide a photo of himself, perhaps because he says that he was once described as a cross between David Essex and an armadillo.)