5 Then at the close of the epistle they add the following words:— We have been compelled, therefore, to excommunicate this man, who thus opposes God Himself, and refuses submission, and to appoint in his place another bishop for the Church Catholic, and that, as we trust, by the providence of God— namely, the son of Demetrianus, a man of blessed memory, and one who presided over the same Church with distinction in former times, Domnus by name, a man endowed with all the noble qualities which become a bishop. And this fact we have communicated to you in order that you may write him, and receive letters of communion from him. And that other may write to Artemas, if it please him; and those who think with Artemas may hold communion with him, if they are so minded.
Source: Epistle (New Advent)