Correspondence from Brindley is brief, 1897, 1912, and on various topics including earwigs.

Correspondence to Bateson; 4pp manuscript notes in Bateson's hand. One letter (from R. Goldschmidt) is in German. Its subject, 'sex chromosome in butterfly', has been inscribed on the first page by Bateson.

Bibliographical notes, in Bateson's hand unless otherwise stated.

Correspondence to Bateson, with one draft of a letter by Bateson (K.67). The subject-matter is wide-ranging, covering work on Drosophila and other studies, lectures and publictions, Morgan's visit to England in May-June 1922, general professional activities and personal matters. Divided into two folders for ease of reference.

Letter to Bateson from H.J. Elwes, with enclosed notes; bibliographical notes in Bateson's hand.

Brief correspondence to Bateson re pieris napi eggs; 6pp experimental data and further pages of notes, all in Bateson's hand.

Contains pencil notes in Bateson's hand, chiefly on various bird species, and also on insects, wheat etc. A few sketches are included. Paginated '1-174'.

9pp manuscript notes by Bateson.

One letter only from Scott to Bateson, 1926, re S.G. Navashin and matters in Russia; Sharp's correspondence to Bateson, 1909, 1914, relates to Arctia caja (Garden tiger moth) and Hawaiian insects.