The Roll of Battle Abbey contains the names of several hundred of the noble companions of William the Conqueror. The work in hand, a compilation by John Bernard Burke, is a heavily annotated list of the companions of the Conqueror, the annotations providing an account of the origins of each companion and his relationship to William, a description of his baronies and estates, an assessment of his position in the feudal hierarchy, and a concise history of his life and times.