Abstract
Caesar left off writing de Bello Gallico at the end of the Alesia campaign in 51 B.C., and his account of the civil war begins in January 49. There was therefore a gap ofa year and more between the narratives in the two collections of Caesar's own Commentaries. Some time soon after Caesar's death, his officer A. Hirtius decided toknit together these unlinked narratives, supplying a preface to account for hisprocedure. It is usually assumed, and it is assumed here, that this Preface, whichappears at the start of B.G. 8 in the MSS, should be taken to mean that its author wasthe author too of the book immediately following, which connects de Bello Gallico with de Bello Civili by narrating, essentially, the transactions of the year 50