Epsom and Ewell lies on the spring line on the north face of the North Downs where pervious chalk meets impervious London clay and a series of springs form. In Ewell the springs which form the Hogsmill River are evident, those in Epsom less so. The springs attracted prehistoric people and remains have been found, mostly in Ewell and particularly near the Hogsmill. In Roman times the road now known as Stane Street, from London to Chichester, passed through Epsom and Ewell. Roman remains have been found in Ewell suggesting a sizeable settlement. Epsom and Ewell have Saxon names: Ewell takes its name from the spring in the centre of the town and Epsom, or Ebbisham, is the enclosure of Ebbi. A Saxon cemetery in The Grove in Ewell was excavated in the 1930s.