Note 103 — PART I FROM THE DATE OF THE GREAT FIRE OF ROME IN THE REIGN OF NERO TO THE DEATH OF MARCUS ANTONINUS A.D. 64–A.D. 180

So Harnack; Duchesne, in his Histoire ancienne de l’Église, vol. i. p. 225 (published 1908), generally adopts Harnack’s conclusions respecting the early date. Lightfoot (vol. i. p. 360, Clement of Rome) also leans to the conclusion that the Clement of the Shepherd is the illustrious Bishop of Rome. This would postulate the earlier date for parts of the work.