Dionysius, therefore, having communicated with him extensively on this question by letter, finally showed him that since the persecution had abated, the churches everywhere had rejected the novelty of Novatus, and were at peace among themselves. He writes as follows:
Historia Ecclesiastica
Book VII, Chapter 4. The Epistles which Dionysius wrote on this Subject
1 section
Eusebius of Caesarea
Trans. Arthur Cushman McGiffert, A Select Library of Nicene and Post-Nicene Fathers of the Christian Church, Second Series, Volume I, 1890. Public domain.