I have called this work a "sketch" because the materials do not exist for a portrait which shall be at once authentic and complete. The original authorities which are now extant for the life of Caesar are his own writings, the speeches and letters of Cicero, the eighth book of the "Commentaries" on the wars in Gaul and the history of the Alexandrian war, by Aulus Hirtius, the accounts of the African war and of the war in Spain, composed by persons who were unquestionably present in those two campaigns. To these must be added the "Leges Juliae" which are preserved in the Corpus Juris.
