In this illustrated reprint of the rare Masonic monograph, Da Costa expresses his belief that modern Freemasonry derives its origin from the Dionysian architects and gives a valuable and comprehensive outline of the opinion of ancient authors on this subject. As the laws of nature and moral rules deduced from them were explained in fables, they were impressed on the memory by symbolical ceremonies which were termed Mysteries. Mr. Hall interprets the central myth of the Dionysian Mysteries and explains the secret I metaphysical doctrines of this cult.