From Pope Damasus
A letter from Damasus to Jerome, in which he asks for an explanation of the word
Source. Translated by W.H. Fremantle, G. Lewis and W.G. Martley. From Nicene and Post-Nicene Fathers, Second Series, Vol. 6. Edited by Philip Schaff and Henry Wace. (Buffalo, NY: Christian Literature Publishing Co., 1893.) Revised and edited for New Advent by Kevin Knight. <http://www.newadvent.org/fathers/3001019.htm>.