Hello. Your posting struck a chord with me because my 2nd great grandfather was a man from Hamburg, Germany who jumped ship in Adelaide or so family stories told. My research revealed he was reported as a ship's deserter in Sydney in 1855 and the ship's listing reveals him as the Danish "kook". Since he never changed his name, it is probable that he opted for a one way voyage only but ships' captains always listed these seaman so they could claim any unpaid wages (often the amount of the reward for the deserter)!
I have found an entry for "Rathje H", who is listed as one of the Chief Fireman on HOHENSTAUFEN of Bremen that arrived in Sydney in 1889
Additionally, I suggest that you look through the entries for emigrants found at
These may assist you with some leads to pursue or consider contacting Web site owner Klaus Struve, who may be able to provide additional assistance.