One personal letter to Nicholson.

Nicholson's Memorial Address for Hurcomb, St Margaret's, Westminster, 5 Nov 1975.Typescript draft with one page of typescript notes; brief correspondence arising; offprint (Field Studies Council Annual Report 1974/1975) containing part of the Address.

Correspondence regarding various conservation matters, including the 'Countryside in 1970' Conferences.

Correspondence regarding various conservation matters, including the World Conservation Strategy.

Chiefly personal correspondence, also including conservation matters etc, 1971-1977; correspondence following Elliott's death in 1989, with typescript of Nicholson's obituary of Elliott for the Oxford Ornithological Society's Annual Report 1990 and offprint of printed version.

Personal correspondence regarding various matters: one undated letter by Nicholson covers philosophical topics. There are also letters by others.

Brief personal correspondence.

Correspondence regarding plans for a memorial to Fisher (he died in 1970), with minutes of the James Fisher Memorial Appeal of which Nicholson was a member. Included is one later letter by Nicholson to a member of the Fisher family (1989).

Correspondence regarding conservation and personal matters; typescript of Nicholson's obituary for Floyd ( The Times, Jul 1971) with related letter.

Correspondence regarding Nature Conservancy and general matters, 1955-1959, and a lunch at All Souls College, Oxford, 1982. Included is one letter to Nicholson from Sir Henry Bunbury, 1947.

One undated personal letter to Nicholson and copy of letter from Nicholson to Lay Fulton, 1973.

Copy of letter from Nicholson to Godwin congratulating him on his election to the professorship at Cambridge, with Godwin's reply.

Nicholson's correspondence with Graham and the IUCN, chiefly regarding the IBP; personal letter from Graham's wife, Mary, to Nicholson, 1965.

Nicholson's correspondence with Graham and the IUCN, chiefly regarding the IBP.

Nicholson's correspondence with Graham and the IUCN, chiefly regarding the IBP; correspondence following Graham's death in 1966 with manuscript draft of obituary by Nicholson for IUCN Bulletin Apr/Jun 1966 and offprint; personal letters from Graham's wife, Mary, to Nicholson and his wife, 1966-1976.

Personal correspondence covering various conservation and other matters.

Correspondence regarding conservation and personal matters.

Personal and ornithological correspondence.

One personal letter from Hobhouse to Nicholson, 1959, and an undated letter from Hobhouse's wife to Nicholson.

Correspondence regarding the Camargue and other conservation areas in the Mediterranean, chiefly S'Albufera, Mallorca.