10pp notes in Bateson's hand, chiefly in relation to published literature. The heading 'conditions' appears at the top of a number of pages. One page is headed 'Dimorphism'.

Correspondence re various topics, including the Genetical Society, dimorphism, Xylotrupes and a debate in 'The Times' about 'mental defectives'.

Scientific correspondence to Bateson, chiefly relating to Doncaster's work on sex determination. Divided into 6 folders for ease of reference.

Brief correspondence to Bateson from Heape, 1907, re studies of sex determination; one letter only from Henslow to Bateson, 1903, re petunia, with small reprint of 'The True Province of Natural Selection', by Henslow, from 'Gardeners' Chronicle', 13 Jan. 1906; one letter only from Hertwig to Bateson, 1911, in German.