What Information Do We Really Have?

An Enquiry into the Religion of the First Inhabitants of Great Britain
by M. l'Abbé de Tressan

Bulfinch's Age of Fable from his Mythology - Chapter XXXIV - The Druids, Iona

The Veil of Isis
or
The Mysteries of the Druids
by W. Winwood Reade

A bibliography of literature on Druids and related culture