With the building of Camp Sherman, the army leveled Mound 13 to three feet above ground and built a barrack over it. In 1920, Ohio archeologists led by William Mills excavated the mound and uncovered the cremated remains of 20 burials. Some were on raised platforms with an array of usual objects. A notable discovery was a raised rectangular grave covered with sheets of mica, an exotic mineral not found in Ohio. Atop the mica were the cremated remains of four people. Their identities are unknown, but this burial showed that the Hopewell honored their dead in differing social and economical ways, similar to American society today.