Letter and 2 drafts of a note for British Birds.

Published in Zeitschrift für Tierpsychologie, 20. 51pp typescript + references, a summary of the paper in German, and correspondence.

Proof copy, with corrections.

Published in Birds of the British Isles, Vol. XI (ed. D.A. Bannerman). 9pp typescript; figure; correspondence.

Correspondence, summary, etc., of a paper on the oystercatchers and their mussels, submitted to British Birds.

Published in The pathology and treatment of sexual deviation (ed. I. Rose). 18pp typescript.

Published in Social behaviour and organisation among vertebrates (ed. W. Etkin). 38pp typescript + figure captions.

Published in Ideas in modern biology (ed. J.A. Moore). Originally appeared in Proceedings of the 16th Zoological Congress, Washington, D.C. 31pp typescript.

Manuscript and typescript drafts on back of instruction sheets for ethology practical work. Undated, but may relate to a paper (with J.J. Ter Pelkwijk) 'Eine reizbiologische Analyse einiger Verhaltensweisen von Gasterosteus aculeatus L.', Z.f.Tierpsychol., 1

Manuscript and typescript drafts. Undated, but reporting on work 1934-1941, 1946-1947.

16pp typescript + references and 1p summary in English.

Three reprints: 'Van den Vos Reinaerde' (September 1960); 'Speurzand' (November 1961); 'Eidoppen zijn gevaarlik' (November 1961).

12pp typescript.

'Egg shell removal by black-headed gull, Larus ridibundus' (2pp typescript, Abstract for "Ibis" of lecture N. Tinbergen, Ann. Sci.Meeting B.O.U.). 'Ringing in sea-bird colonies' (with I J Patterson), published in The Ringers' Bulletin (2pp typescript). Copy of vol. 1, no. 10 of The Ringers' Bulletin.

Article written with H. Kruuk, and published in De Levende Natuur, 65. 8pp typescript.

Article written with H. Kruuk & M. Paillette, and published in Bird Study, 9. 16pp typescript.

Article written with H. Kruuk, M. Paillette, & R, Stamm, and published in British Birds, 55. 16pp typescript; correspondence; ms. notes headed '1961 Hide observations about the distinction between egg and eggshell'.

Introduction to the 1st Annual of the Cornell Laboratory of Ornithology. Foreword to Bird by Lois and Louis Darling. Foreword to To Know a Fly by Vincent Gaston Dethier.

Published in Symposia of the Zoological Society of London, 8. 13pp typescript; proof; and correspondence.

Published in British Birds, 55. 5pp typescript; correspondence; and a draft paper (7pp typescript) by M. Rothschild - 'Development of foot movements in black-headed gull (Larus r. ridibundus L.)'.