| RefNo | Title | Source |
| DF/ZOO/236/1/38 | External Correspondence: British Ornithologists’ Union | |
| DF/ENT/340/26/16 | British Museum (Clay, Theresa Rachel) | |
| DF/ZOO/236/3/100 | External Correspondence: Kear, Janet | |
| DF/ZOO/236/1/330 | Subject File: Reply to document circulated by the BOU (British Ornithologists' Union) Records Committee (1988) on 'Suggested changes to the English names of some Western Palearctic Birds'. | |
| DF/TR/1/1/33/74 | British Ornithologists Union | |
| DF/TR/1/1/34/67 | British Ornithologists Union | |
| DF/TM/1/38/10 | Correspondence R: Rothschild | |
| DF/ZOO/236/4/24 | External Correspondence: Houston, David C | |
| DF/ZOO/213/107 | British Ornithologists Union Mascarene Islands Expedition: correspondence | |
| DF/TR/1/1/32/58 | British Ornithologists Union | |
| DF/TR/1/1/31/76 | British Ornithologists Union | |
| DF/TR/1/1/25/25 | Barrow, John | |
| DF/ZOO/236/4/175 | External Correspondence: Kear, Janet | |
| DF/ZOO/236/4/73 | External Correspondence: Melland, Amicia | |
| DF/ZOO/236/4/5 | External Correspondence: Monk DM, Dr J F | |
| DF/TR/1/1/24/407 | Sclater, [Phillip] [Lutley] | |
| DF/ZOO/236/4/127 | External Correspondence: Monk, James | |
| DF/ZOO/230/120/14 | British Ornithologists Union - Centenary Meeting, 20-23 March 1959 | |
| DF/ZOO/236/6/149 | External Correspondence: Campbell, Bruce | |
| DF/ZOO/236/6/196 | External Correspondence: Medway, Gathorne, Lord | |
| DF/ADM/1004/133 | British Ornithologists Union | |
| DF/ZOO/230/120/12 | British Ornithologists’ Union and British Ornithologists’ Club | |
| DF/ZOO/236/4/234 | External Correspondence: Houston, David C. | |
| DF/TR/1/1/28/85 | British Ornithologists Union | |
| DF/ZOO/200/127/55 | British Ornithologists' Union Centenary Expeditions | |
| DF/ZOO/230/122/386 | Seychelles: Egg exploitation | |
| DF/ZOO/230/1/68 | Godman, F D | |
| DF/ZOO/236/6/86 | External Correspondence (Mollusca and Birds): Monk, Dr James F. | |
| DF/ZOO/236/13 | Correspondence of Richard Meinertzhagen (1878-1967), ornithologist and donor | |
| DF/ADM/1001/42 | Outgoing Letterbook, 11 Oct 1911 - 24 Apr 1912 | |
| DF/ADM/1004/903 | British Ornithologists Union Expedition to the Great Snow Mountains of Dutch New Guinea: correspondence, handmap and memoranda | |