The Eagles' BroodeBook - 1994
Most know him as Merlyn; all call him Commander. Caius Merlyn Britannicus is responsible for the safety of the colony known as Camulod, and for the welfare of the colonists who look to him for guidance, leadership, justice and salvation. Uther Pendragon, the man who will father the legendary Arthur, is the cousin Merlyn has known and loved since their births--four hours apart on the same day, the year the legions left Britain. As different as can be, they are inseparable: two faces of the same coin. In a world torn apart by warfare and upheaval, each is the other's certainty until a vicious crime--one that strikes at the roots of Merlyn's own life--drives a wedge between them.
From the Paperback edition.