Only one manuscript of Beowulf has survived. It was in Sir Robert Cotton’s library. Cotton had been a student of that careful genius William Camden, who, through a lifetime’s work, formulated a different view of history: not the record of victory but the recollection of lost worlds and times. He and his fellow Antiquarians searched out fragments and ruins: Roman urns in the fields, Saxon burials under St Paul’s, a giant’s thigh-bone under a London cellar. They collected ancient manuscripts.