Cossar, William Master ship builder at King's Dockyard from 1812 and later landowner on northern beaches. Occupation Ship builder {"name":"Ship builder","target":"","target_text":null,"date":{"#markup":"<span class='date'><\/span>"},"date_start":null,"date_end":null} Landowner {"name":"Landowner","target":"","target_text":null,"date":{"#markup":"<span class='date'><\/span>"},"date_start":null,"date_end":null}