Around 40,000 Irish convicts were transported to Australia between 1791 and 1867, including at least 325 who had participated in either the Irish Rebellion of 1798, the rebellion of 1803 or the Young Ireland skirmishes in 1848. Once in Australia, some were involved in the 1804 Castle Hill convict rebellion. Continual tension on Norfolk Island in the same year also led to an Irish revolt. Both risings were soon crushed. As late as the 1860s Fenian prisoners were being transported, particularly to Western Australia, where the Catalpa rescue of Irish radicals off Rockingham was a memorable episode.