| RefNo | Title | Source |
| WP/1/8/3 | John Aitken to Alfred Russel Wallace, from Ardenlea, Falkirk, Scotland | |
| WP/17/5/4 | John Tyndall | |
| WP/1/8/120 | R Threlfall to Alfred Russel Wallace, from Edgbaston, Birmingham | |
| WP/1/8/287 | Alfred Russel Wallace to Mr. [John] Tyndall from Hurstpierpoint, Sussex | |
| WP/1/8/224 | John Tyndall to Alfred Russel Wallace | |
| WP/1/8/2 | John Aitken to Alfred Russel Wallace, from Ardenlea, Falkirk, Scotland | |
| WP/1/1/187 | Letter from Alfred Russel Wallace to his son William Wallace, from Broadstone, Dorset | |
| WP/1/8/261 | Alfred Russel Wallace to the Ed. [Editor] of Pall Mall Gazette | |