| RefNo | Title | Source |
| WP/12/34 | 'The Biologist's Problem' by T D A Cockerell | |
| WP/12/28 | 'Florissant; a Miocene Pompeii' by T D A Cockerell | |
| DF/PAL/100/100/2 | Cockerell, Theodore D A | |
| DF/TR/1/1/25/94 | Cockerell, [Theodore] D A | |
| WP/16/1/9 | Stamped envelope addressed by T D R Cockerell to W. G Wallace, Old Orchard, Broadstone, Dorset | |
| WP/1/9/49 | Theodore Dru Allison Cockerell to Annie Wallace | |
| DF/DIR/932/1/155 | Cockerell, Theodore Dru Allison, 1866-1948 (Jamaica); Gray S O | |
| DF/ZOO/233/3/2/5 | Correspondence Cr - Co | |
| WP/16/1/8 | 'Recollections of Dr R A Wallace' by T D A Cockerell | |
| DF/ZOO/252/1/13/19 | Cockerell, Theodore Dru Allison (Colorado) | |
| DF/PAL/100/61/92 | Cockerell, Theo D A | |
| DF/PAL/100/61/94 | Memo re. donation from T D A Cockerell | |
| DF/PAL/100/61/93 | Memo re. donation from T D A Cockerell | |
| DF/PAL/100/59/122 | Cockerell, T D A | |
| DF/PAL/100/59/125 | Cockerell, T D A | |
| DF/PAL/100/59/123 | Cockerell, T D A | |
| DF/PAL/100/59/127 | Cockerell, T D A | |
| WP/13/1 | Print and correspondence re John Hampden ‘Flat Earth’ controversy | |
| WP/2/6/3/11 | Visit to Alfred Russel Wallace, June 27, 1904 | |
| DF/PAL/100/61/91 | Cockerell, Theo D A | |
| WP/16/1/7 | Letter from T D A Cockerell to William Greenell Wallace from Boulder, Colorado | |
| DF/PAL/128/6/2 | Papers of T D A Cockerell and P E S Whalley | |
| DF/PAL/100/59/124 | Cockerell, T D A | |
| DF/PAL/100/59/126 | Cockerell, T D A | |
| DF/PAL/100/59/128 | Cockerell, T D A | |
| DF/PAL/100/59/129 | Cockerell, T D A | |
| DF/ZOO/200/76/10 | Correspondence C (general): File 6 | |
| WP/12/14 | Review by T D A Cockerell, 1898, of 'Darwin, and after Darwin. III. Post-Darwinian Questions, Isolation and Physiological Selection' by G J Romanes | |
| WP/2/3/36 | Obituaries and Memoirs of Alfred Russel Wallace | |