LEXINGTON, Va. (AP) — A team led by a Washington and Lee University archaeology professor has unearthed thousands of early 19th-century artifacts at a campus construction site.

The university says in a news release that Alison Bell found the first of the items on the surface when she dropped by to check on the restoration of Robinson Hall, an 1840 building that houses the math department. She and some helpers returned a couple of days later and began digging. They worked three 10-hour days and recovered thousands of items buried only two inches under the surface.

Bell believes what they’ve uncovered is the construction site of Graham Hall, which was built in 1804 and demolished in 1835. Among the items that have been recovered are a pocketknife, bone toothbrushes, medicine vials, buckles and buttons.