| RefNo | Title | Source |
| DF/ZOO/205/1/97-98 | J Forshall to Children - instructions for James Brooke | |
| DF/ZOO/205/1/100 | Children to J Forshall - instructions for James Brooke in the Far East | |
| DF/ZOO/205/1/99 | Children - rough notes for Mr [James] Brooke | |
| WP/1/3/36 | Letter from Alfred Russel Wallace to his mother | |
| WP/1/9/32 | James Brooke to Alfred Russel Wallace from Singapore | |
| WP/1/3/37 | Letter from Alfred Russel Wallace to Fanny (Mrs Thomas Sims) | |
| WP/1/3/32 | Letter from Alfred Russel Wallace to his mother (Mary Anne Wallace) | |
| WP/1/3/33 | Letter from Alfred Russel Wallace to George Silk | |