Dead Men Tell No Tales by EW Hornung

Meeting failure in his search for wealth in the 1851 Australian gold rush, a dispirited Mr. Cole takes the next available ship back to England -- and falls in love with Eva Denison, a beautiful and accomplished young woman traveling with her exotic Portuguese step-father. After a disaster at sea Cole returns to anonymity in London... or so he thinks. Events lead to the discovery of a horrible conspiracy, and then to an adventure that may cost Cole his greatest love.