| RefNo | Title | Source |
| WP/1/8/39 | W A Davidson to Alfred Russel Wallace, from Glen-Shee, Uxbridge, London | |
| WP/7/111 | Letters re the Insurance Act | |
| WP/14/2/2 | 'Pullman Cars' | |
| WP/1/1/203 | Letter from Alfred Russel Wallace to his son William Wallace, from Broadstone, Dorset | |
| WP/14/2/3 | Slaughter of hogs in a Chicago meat works | |
| WP/2/3/26 | Obituaries and Memoirs of Alfred Russel Wallace | |
| WP/2/3/3 | Obituaries and Memoirs of Alfred Russel Wallace | |
| DF/ENT/332/1/59 | Straelen, V van; Strouhal, Dr H; Sturgess, M; Suffolk Naturalists' Society; Sunday Times; Society of Sussex Downsmen; Sutton, S D B; Sutton, S; Sutton; Swain, H D; Swinton, Dr W E; Szabo, Dr R | |
| DF/ENT/332/1/61 | Times Newspaper; Tite, G E; Tkachyk, P; Todd, R A U; Tomlinson, Reverend C F; Tong, E H; Toogood, G E; Tranter, T H; Traub, Lieutenant Colonel R; Tremewan, W G | |
| WP/1/2/113 | Alfred Russel Wallace to Violet Wallace, from Parkstone, Dorset | |