| Reference Number | Title | Date |
| RBC/46 | Letter from Richard Mackenzie to Richard Butcher | 24 February 1854 |
| RBC/47 | Letter from Kenneth Mackenzie to Richard Butcher | 9 February 1855 |
| RBC/48 | Letter from George Jones to Richard Butcher | 10 February 1855 |
| RBC/51 | Letter from Oliver Pemberton To Richard Butcher | 2 September 1854 |
| RBC/63 | Letter from Thomas Curling to Richard Butcher | 21 May 1855 |
| RBC/86 | Letter from Henry Smith and Richard Butcher | 5 February 1855 |
| RBC/115 | Letter from Richard James Mackenzie to Richard Butcher | 4 March 1854 |