 A firm believer in the medicinal properties of pawpaws, he developed and marketed Lucas' Papaw Ointment, which is still produced by Lucas's descendants from a location at Beaudesert Road, Acacia Ridge.In 2009 as part of the Q150 celebrations, the Lucas' Pawpaw Ointment was announced as one of the Q150 Icons of Queensland for its role as an iconic "innovation and invention".In 1882 Thomas Lucas founded the Field Naturalists Club of Victoria.