Original description reads: "Bronze Plaque, on Fort Jefferson Monument." Inscription on plaque reads: "Fort Jefferson. Built by the army of General Arthur St. Clair in October 1791 and used as a military post during the campaigns against the north-western Indian tribes. MCMVII." The monument is made of faced granite field boulders, six feet square and twenty-feet tall. The area is maintained as a roadside park with a picnic shelter and grills. No part of the fort remains. Fort Jefferson Park and Monument marks the site of an advance outpost of General Arthur St. Clair. It was named in honor of Thomas Jefferson, then Secretary of State. One of a chain of defensive forts built to protect army supplies from Indians, it served as a supp...