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| YEAR | DATE | EVENT | GOVERNOR |
| 1883 | 3 april | UK colony | H.M. Chester |
| 1884 | 6 november | UK protectorate | Sir Peter Henry Scratchley |
| 1885 | 5 december | Hugh Hastings Romilly |
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| YEAR | DATE | EVENT | GOVERNOR |
| 1886 | John Douglas | ||
| 1887 | William MacGregor | ||
| 1898 | George Ruthven Le Hunte | ||
| 1903 | june | Christopher Stansfield Robinson | |
| 1904 | 20 june | Francis Rickman Barton |
| YEAR | DATE | EVENT | GOVERNOR |
| 1906 | 1 september | Australian colony | |
| 1908 | (Sir) John Hubert Plankett Murray | ||
| 1940 | Hubert Leonard Murray | ||
| 1942 | 12 february | Basil Moorhouse Morris | |
| 1945 | 31 october | Jack Keith Murray | |
| 1949 | Part of Papua-New Guinea Australian Trust administration |