| RefNo | Title | Source |
| WP/1/3/31 | Letter from John Wallace, from Columbia | |
| WP/1/3/35 | Letter from Alfred Russel Wallace to Fanny, (Mrs Thomas Sims) | |
| WP/1/1/164 | Letter from Alfred Russel Wallace to his son William Wallace, from Parkstone, Dorset | |
| WP/1/3/97 | Handwritten copy of letter from John Wallace to his mother Mary Wallace, from Campo Seco [California] | |
| WP/1/3/87 | Letter from John Wallace to his brother Alfred Russel Wallace | |
| WP/1/3/101 | Handwritten copy of letter from John Wallaces to his mother Mary Wallace, from Saw Mill Camp | |
| WP/1/3/106 | Handwritten copy of letter from John Wallace to his mother Mary Wallace, from Columbia | |
| WP/1/3/104 | Handwritten copy of letter from John Wallace to his mother Mary Wallace, from Columbia | |
| WP/1/3/100 | Handwritten copy of letter from John Wallace to this sister Fanny [Frances] Sims, from Mill Seat Camp | |
| WP/1/3/102 | Handwritten copy of letter from John Wallace to [his mother Mary Wallace], from Summit Pass | |
| WP/1/3/103 | Handwritten copy of letter from John Wallace to [his mother Mary Wallace], from Columbia | |
| WP/1/3/85 | Envelope annotated in pencil [in Alfred Russel Wallace's hand] 'A.R.W recent letters to Fanny' | |
| WP/1/3/83 | Letter from Fanny Sims to her brother Alfred Russel Wallace | |
| WP/1/2/55 | Alfred Russel Wallace to Violet Wallace, from Parkstone, Dorset | |
| WP/14/2/28 | John Wallace obituary | |
| WP/18/37 | Testimonial by Alfred Russel Wallace on behalf of his brother John Wallace | |
| WP/18/9 | Empty brown envelope labelled 'John Wallace's letter to Mr W. ...' | |
| WP/1/3/6 | Letter from Alfred Russel Wallace to his brother John | |
| WP/1/3/36 | Letter from Alfred Russel Wallace to his mother | |
| WP/1/3/105 | Handwritten copy of letter from John Wallace to his mother Mary Wallace, from Columbia | |
| WP/1/3/98 | Handwritten copy of letter from John Wallace to his mother Mary Wallace, from the Head Waters of the Stanislaus River | |
| WP/1/3/86 | Envelope addressed to Alfred R. Wallace | |
| WP/1/3/29 | Letter from Alfred Russel Wallace to his mother (Mary Anne Wallace) | |
| WP/1/2/62 | Alfred Russel Wallace to Violet Wallace, from Parkstone, Dorset | |
| WP/1/3/34 | Letter from Alfred Russel Wallace to Fanny, (Mrs Thomas Sims) | |
| WP/1/3/96 | Typewritten manuscript of excerpts from letters mainly by John Wallace to his relatives in England | |
| WP/1/3/99 | Handwritten copy of letter from John Wallace to his mother Mary Wallace, from Saw Mill Camp | |
| WP/1/3/54 | Letter from Alfred Russel Wallace to John Wallace | |
| WP/1/3/59 | Letter from Alfred Russel Wallace to John Wallace | |
| WP/1/5/36 | Alfred Russel Wallace to his wife Annie | |
| WP/2/1/25 | John Wallace's house, Stockton | |
| WP/1/3/96/1 | John Wallace to his mother (Mary Ann Wallace) | |
| WP/1/3/96/19 | John Wallace to Fanny (Frances) Sims | |