Book 4 — Chapter 18 - Works of Justin
Book IV moves through Trajan, Hadrian, Antoninus, and Marcus Aurelius, including the Bar Kokhba war, early apologists, Polykarpos, Justin, Hegesippus, Melito, Tatian, and Bardaisan. Eusebius's library work is central here. He names books, quotations, disputed writings, teachers, and chains of reception, often preserving information about works that later disappeared. In this reconstruction the chapter coordinate is preserved as Book 4, Chapter 18, and the full subject is retained under the heading 'Works of Justin'. Names, dates, quoted-source relationships, and political or textual function are kept distinct from Eusebius's own interpretive claims.