In checking a map for the location of some customers in and around Darwin, I noticed that there is a gulf on the northern coast of Australia west of Darwin named the Joseph Bonaparte Gulf. It seems there is an interesting story here, but I have no idea what it is. I know of no French exploration of the north coast of Australia between 1799 and 1815 and even if there had been I would not have expected the British to retain the name. I checked an encyclopedia and it indicates that the Gulf was definitely named after Napoleon's brother. but why?