| Reference Number | Title | Date |
| RBC/25 | Letter from Henry Smith to Richard Butcher | 15 May 1855 |
| RBC/29 | Letter from Henry Smith to Richard Butcher | 1 May 1855 |
| RBC/32 | Letter from William Fergusson to Richard Butcher | 18 May 1855 |
| RBC/152b | Letter from Henry Smith to Richard Butcher | 18 November 1856 |
| RBC/166 | Letter from Henry Smith to Richard Butcher | 24 November 1856 |
| RBC/191 | Letter from Henry Smith to Richard Butcher | 17 February 1857 |
| RBC/196 | Letter from Henry Smith to Richard Butcher | 9 February 1857 |
| RBC/199 | Letter from Henry Hancock to Richard Butcher | 10 February 1857 |