Epistle 5., Which is the First on the Subject of Baptism Addressed to Stephen, Bishop of Rome.
Understand, however, my brother, that all the churches located in the east, and also in remoter districts, that were formerly in a state of division, are now made one again; and all those at the head of the churches everywhere are of one mind, and rejoice exceedingly at the peace which has been restored beyond all expectation. I may mention Demetrianus in Antioch; Theoctistus in Caesareia; Mazabanes in Aelia, the successor of the deceased Alexander; Marinus in Tyre; Heliodorus in Laodicea, the successor of the deceased Thelymidres; Helenus in Tarsus, and with him all the churches of Cilicia; and Firmilian and all Cappadocia. For I have named only the more illustrious of the bishops, so as neither to make my epistle too long, nor to render my discourse too heavy for you. All the districts of Syria, however, and of Arabia, to the brethren in which you from time to time have been forwarding supplies and at present have sent letters, and Mesopotamia too, and Pontus, and Syria, and, to speak in brief, all parties, are everywhere rejoicing at the unanimity and brotherly love now established, and are glorifying God for the same.
Source: Epistles and Epistolary Fragments (New Advent)