“In the Eastern church till nearly the end of the fourth century we find, as has been said, the divine celebration of Christ’s nativity and baptism on January 6th. The date of the severance of the two can be approximately fixed, for Chrysostom refers to it as a matter of merely a few years’ standing, in a sermon probably delivered on the Christmas day of 386 a.d. How far back we are to refer the origin of this two-fold festival it is not easy to determine, the earliest mention of any kind being the allusion by Clement of Alexandria to the annual commemoration of Christ’s baptism by the Basilidians (Stromata, lib. i. c. 21). At any rate by the latter part of the fourth century the Epiphany had become one of the most important and venerable festivals in the Eastern church.” Dict. Christ. Ant. i. 617.