Carpenter Edward Carpenter 
Solar Myths and Christian Festivals: The Pagan Origins of Christian Beliefs [EPUB ebook] 

To the ordinary public, the connection between Paganism and Christianity still seems rather remote. Indeed the common notion is that Christianity was really a miraculous interposition into and dislocation of the old order of the world; and that the pagan gods (as in Milton’s Hymn on the Nativity) fled away in dismay before the sign of the Cross, and at the sound of the name of Jesus. Doubtless this was a view much encouraged by the early Church itself, if only to enhance its own authority and importance. Yet, as is well known to every student, this view of the originality of the Christian revelation is quite misleading and contrary to fact. The main Christian doctrines and festivals, besides a great mass of affiliated legend and ceremonial, are really quite directly derived from, and related to, preceding Nature worships; and it has only been by a good deal of deliberate mystification and falsification that this derivation has been kept out of sight.