Complex sentence: The tradition of the story is stated in Eusebius, History of the Church ("Historia Ecclesiastica"), although the events would not be in tune with the official policy worked out by Pliny the Younger and the Emperor Trajan a few decades earlier.
Split into simpler sentences: The tradition of the story is stated in Eusebius, History of the Church ("Historia Ecclesiastica"). Although the events would not be in tune with the official policy worked out by Pliny the Younger and the Emperor Trajan a few decades earlier.