| 22 August 1864 |
22 June 1865 |
Convention for the Amelioration of the Condition of the Wounded in Armies in the Field |
| 28 March 1889 |
1 July 1889 |
Convention between the Colony of the Cape of Good Hope and the Orange Free State for the establishment of a customs union |
| 24 April 1889 |
24 April 1889 |
Protocol between the Colony of the Cape of Good Hope and the Orange Free State respecting the Customs Union Convention of 28 March / 5 April 1889. |
| 20 June 1890 |
6 April 1891 |
Convention Between Great Britain and the Orange Free State , for the Mutual Extradition of Fugitive Criminals |
| 2 July 1890 |
31 August 1891 |
General Act of the Brussels Conference relative to the African Slave Trade (Great Britain, Austria-Hungary, Belgium, Congo, Denmark, France, Germany, Italy, Netherlands, Persia, Portugal, Russia, Spain, Sweden and Norway, Turkey, United States, and Zanzibar). (with annexed Declaration of the same date.) |
| 15 June 1897 |
|
Universal Postal Convention |