At D.11: correspondence to Bateson from E. Nettleship, A.N. Gossage and V. Magnus, 1908-1911, nd; manuscript notes by Bateson. The Magnus letters are numbered 1-5. All this material was found within an original folded sheet of paper inscribed 'Albin'. At D.12: further letters from V. Magnus, 1909; letter to Bateson. 1922, from Henry Carroll of Montreal, Canada, with pedigree diagram; manuscript notes by Bateson and printed pedigrees with his annotations.
Correspondence with various individuals, including C.L.W. Noorduijn, re experiments on crossing budgerigars. Included are 4pp typescript scientific notes by Noorduijn which also refer to canaries. One letter is in Dutch.
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.
Contents of an envelope so inscribed. Correspondence to Bateson from Florence E. Frowd relating to breeding of cats (particularly 'silver cats'), with accompanying notes on 'The Chinchilla Variety', pedigrees and two specimens of cats' fur. Included is one further letter (undated) from another.
Offprint of W. Hind, 'The Effect on the Tails of a Family of English Kittens...', 'Ann. Rep. N. Staffs Field Club', 1889; brief manuscript bibliographical note by Bateson.
5pp manuscript notes by Bateson, headed 'Vaviloff [sic] 2 Feb. 1914' on first page; two further pages of notes on small pieces of paper (topics unclear). Included is a photocopy of an incomplete and undated letter from Beatrice Bateson, recipient unknown.
Correspondence to Bateson re hound colours and horse breeding, with related offprint. Inserted into one letter is a small piece of paper with Bateson's manuscript notes.