The life and deeds of Gnaeus Iulius Agricola - governor of the Roman province of Britannia under the Flavian emperors - are best retold by his son-in-law, Tacitus. Tacitus describes not only the successful Roman campaigns in Britannia, but also the characteristics of the country. Thus, his Agricola is one of most elemental sources for the study of the history and inner structure of this northernmost Roman province.