Around A.D. 200, Native Americans built four earthen mounds along the West Harpeth River. These stood between 8 and 20 feet tall and contained copper artifacts, demonstrating trade between Tennessee and the Ohio valley. On behalf of the Smithsonian and the Peabody Museum at Harvard, Tennessee residents W.M. Clark and Edwin Curtis excavated two of the mounds in 1875 and 1879. Two mounds remain today. The site is named for Samuel F. Glass, who owned the property in the nineteenth century.