13pp and 15pp typescript drafts, undated, but reporting on work 1952-1965.

15pp typescript, manuscript and typescript notes, etc.

Preface, chapter plans, and notes, undated, but drafted on the back of pages from De Levende Natuur.

25pp typescript draft, published in Proceedings of the XIV International Ornithological Congress (ed. D.W. Snow).

'South Walney Nature Reserve and Walney Bird Observatory Annual Report'. A copy of the report, with manuscript notes.

Published in Die Vogelwarte, 26. Proof copy, with photographs, and a manuscript note headed 'Gulls and crabs'.

Manuscript and typescript notes and drafts including an 8pp typescript with manuscript inscription '(1st draft NT)'. Undated, the latest bibliographical reference is 1972.

Foreword to Among the Elephants, by Iain and Oria Douglas-Hamilton, published in 1975.

11pp typescript submitted to De Levende Natuur.

8pp and 9pp typescript drafts, published in De Levende Natuur, 1978.

Draft forewords, chapter plans, notes, etc. This book was never published, nor were the several articles extracted from the text.

Chapter I 'The emergence of man': 15pp typescript 'Copy - Jan 1975 - not polished', and shorter manuscript and typescript notes and drafts. This book was never published, nor were the several articles extracted from the text.

Chapter II 'Modern man': 16pp typescript, heavily annotated. This book was never published, nor were the several articles extracted from the text.

Chapter III 'Signs of disadaptation': shorter manuscript and typescript notes and 16pp manuscript draft; 8pp typescript drafts. This book was never published, nor were the several articles extracted from the text.

Chapter IV 'What to do?': 10pp manuscript draft. This book was never published, nor were the several articles extracted from the text.

Correspondence with George Allen & Unwin, 1975, and draft forewords, etc., for a proposed collection of articles. This book was never published, nor were the several articles extracted from the text.

Correspondence and a 7pp typescript. Tinbergen was approached in June 1975 on behalf of a study group at the University of North Carolina at Chapel Hill to contribute to a proposed volume of opinions of Nobel laureates on the human predicament. Tinbergen sent 'Time is running out' but reserved the copyright as he intended to publish the statement as part of a 'bundle' of reprints of his other papers on this subject.

29pp typescript. Published in Growing points in ethology (ed. P.P.G. Batson and R.A. Hinde).