Firmilian, Bishop of Caesarea in Cappadocia, to Cyprian, Against the Letter of Stephen. A.D. 256.
Argument.— The Argument of This Letter is Exactly the Same as that of the Previous One, But Written with a Little More Vehemence and Acerbity Than Becomes a Bishop, Chiefly for the Reason, as May Be Suspected, that Stephen Had Also Written Another Letter to Firmilianus, Helenus, and Other Bishops of Those Parts.
Source: The Epistles of Cyprian (New Advent)