For centuries the mounds were believed to cover the bodies of those killed at the Battle of Ashingdon in 1016, but excavation demonstrated that they are the graves of a wealthy family and date from the 1st or 2nd century AD. Excavations in the 19th century found large wooden chests, decorated vessels in bronze, glass and pottery and an iron folding chair, most of which were lost in a later fire at Bartlow Hall. A small Roman villa, occupied until the late 4th century, was situated north of the mounds and was excavated in 1852.