The Ancient Druids: Their History and Religion, Ancient Mysteries Series

Centuries before whisperings began, of secret knowledge being handed down from the ancient Greeks, through shrouded fraternities such as the Rosicrucians and Freemasons, the Druids were slowly and steadfastly creating priests and philosophers of their own, akin to the Brahmans of India, the Magi of the Persians, as well as the hierophants and scholars of what would eventually become known to the world as the Western Mystery Tradition.