David Marion Dunbar died at sea, he was the first mate on a clipper ship The Driver in 1856, his son also with the same name was born shortly after his death, myself and many others have never been able to find who his parents were, he is my gggrandfather and I'm desperate to find the rest if my family. I'm not 100% on a birth date as never found a birth certificate could anyone help PLEASE I would be eternally grateful, Thankyou.