The Eagle of the Ninth
Rosemary Sutcliff
 Discharged because of a battle wound, a young Roman officer Marcus Flavius Aquila tries to discover the truth about the disappearance of his father's legion in northern Britain. Disguised as a Greek oculist and travelling beyond Hadrian's Wall with his freed ex-slave, Esca, Marcus finds that a demoralised and mutinous Ninth Legion was annihilated by a great rising of the northern tribes. In part, this disgrace was redeemed through a heroic last stand by a small remnant (including Marcus's father) around the legion's eagle standard. Marcus's hope of seeing the lost legion re-established is dashed, but he is able to bring back the bronze eagle so that it can no longer serve as a symbol of Roman defeat — and thus will no longer be a danger to the frontier's security.