Extant Fragments: To Sixtus, Bishop. 22

2. And, moreover, to our beloved co-presbyters Dionysius and Philemon, who before agreed with Stephen, and had written to me about the same matters, I wrote previously in few words, but now I have written again more at length. In the same letter, says Eusebius, he informs Xystus of the Sabellian heretics, that they were gaining ground at that time, in these words:--