4 volumes · UK National Archives
| Reference | Volume Title | TNA |
|---|---|---|
| CO 487/1 | Entry Book of Letters from Secretary of State (Offices and Individuals), 1871-1872, pp. 1-46; Then Register (Offices and Individuals), 1871-1875. Includes Out-Letters Relating to Borneo | ↗ |
| CO 487/2 | Despatches, 1873-1887; Offices and Individuals, 1876-1887. Includes Out-Letters Relating to Borneo | ↗ |
| CO 487/3 | Register of Out-Letters. Includes Out-Letters Relating to Borneo | ↗ |
| CO 487/4 | Register of Out-Letters. Includes Out-Letters Relating to Borneo | ↗ |