I am trying to trace my GGGF Captain William Cottier, who was born on the Isle of Man c1821. He was a master mariner.and married Sarah Jane Gratrix ( the widow of a Captain Gratrix) in San Francisco in 1852 and subsequently came to Australia where he commanded ships mostly on the coastal trade. He was divorced in 1869 and subsequently remarried in Brisbane in 1888. He died in Sydney in 1909