Watson served as [[sheriff]] of St. Helena Parish from 1900 to 1908, when he became the District 10 state senator<ref name=dlb/> for St. Helena and Tangipahoa parishes, a post he held for one term until 1912.<ref name=statesenate>{{cite web|url= | Watson served as [[sheriff]] of St. Helena Parish from 1900 to 1908, when he became the District 10 state senator<ref name=dlb/> for St. Helena and Tangipahoa parishes, a post he held for one term until 1912.<ref name=statesenate>{{cite web|url= |