Robson's correspondence to Bateson, 1921-1924, relates to molluscs and general professional matters'. Brief correspondence from Rolleston to Bateson, 1925, concerns adrenal glands and sexual characteristics. Copy letter from Thorburn Brailsford Robertson to Bateson, 14 Nov 1923

Brief correspondence to Bateson with enclosed notes.

Letter to Bateson from S.F. Harmer re observed changes in sex in molluscs, 1922; 4pp Bateson's manuscript notes on published literature; printed 'Abstract of the Proceedings of the Zoological Society of London', 17 April 1917, with an annotation in Bateson's hand.

Contents of two envelopes inscribed 'Size'.