Portrait, etching, Charles Darwin, Paul Adolphe Rajon after Ouless, 1874-1876; remarque proof, cut to 57x44cm, platemark 55.5x40.6cm, image 40.6x31.3cm; After an oil by Ouless, exhibited Royal Academy, 1875, `Rajon aqfort' scratched faintly in centre below image; heads of Darwin and six other men in margins beside and below image, portrait, HL to L, almost profile