Yet another rumour for the site:
At Enstone [...] is another Druidical remain, a ruined Cromlech, popularly called the “Hoarstone.” [...] There is a tradition that a city once existed near this spot, and the remains of wells have been found in the neighbouring fields.* An ancient trackway, marked in some old maps as the “London Road” (communicating with the country about Worcester and Hereford), runs westward from the Hoarstone, passing near several Tumuli which will be mentioned hereafter.
*Information from the Rev. E. Marshall of Enstone.
Page 8 in ‘The History of Banbury’ by Alfred Beesley [1841?] (online at the Internet Archive).