Headnote
LOUTRE ISLAND, a post-office of Montgomery CO., Missouri. (Baldwin & Thomas, A New and Complete Gazetteer of the United States ... 1854)
LOUTRE ISLAND, A post office of Warren(sic) county, near the entrance of Loutre river into the Missouri, 41 miles east by north of Jefferson City. (The Missouri State Gazetteer and Business Directory, 1860)