In the Shawnee Reservation, an Indian mound probably excavated in 1884 by the Smithsonian Institution appears from archaeological findings to have been built between A.D. 1 and 500 by Hopewellian mound builders. Excavators found a crematory basin at the base of the mound and at least four skeletons higher up. One of the largest groups of mounds in the United States once existed in Dunbar, Institute, and South Charleston. In 1883-84, Smithsonian workers recorded 50 mounds and at least 10 earthworks, low earth embankments in geometric forms. Great Smith Mound, 35 feet high and 175 feet in diameter, stood in Dunbar. The mounds in Shawnee Reservation and downtown South Charleston are all that remain of these prehistoric works today.