To Pompey, Against the Epistle of Stephen About the Baptism of Heretics.
Argument.— The Purport of This Epistle is Given in St. Augustine's “Contra Donatistas,” Lib. V. Cap. 23. He Says There: “Cyprian, Moreover, Writes to Pompey on the Same Subject, When He Plainly Signifies that Stephen, Who, as We Learn, Was Then a Bishop of the Roman Church, Not Only Did Not Agree with Him on Those Points, But Even Had Written and Charged in Opposition to Him.”
Source: The Epistles of Cyprian (New Advent)