A detail taken from a sketch by/of Mary in a studio. It is probably the one near Ladbroke Grove belonging to Asphodel Fleishman, a fellow student at the Slade, who became Carol's God-mother.

From her entry in Who's who in art:

COHEN, Mary; artist in oil, pen and wash, water-colour; b London, 21 Nov 1910; d of the late Ernest M Joseph, CBE, FRIBA, architect; m Cdr Kenneth Cohen, CB ,CMG, RN; one s, one d. Studied art: Florence, Slade under Prof Tonk and Prof Schwabe (1928-31), and Euston Road school. Exhib: Leicester Galleries Mixed Exbns, RA, RBA, NEAC, London Group, Roland, Browse and Delbanco, New Grafton Gallery. Work In permanent collections: National Trust, Whitworth, AG and private collections in Gt Britain, France and USA. Address: 33 Bloomfield Terr, London SW1. Signs work: ‘Mary SC’

Mary, self-portrait detail, and happily not missing.