Bjorn is fostered to a Harp player, an old man who originally fought the Normans at Hastings, who refers to being part of that Shield Wall resisting William the Conqueror. The instrument becomes a key feature of the narrative, being a symbolic link to the indigenous Welsh and British peoples with whom the Norse of Lakeland have intermingled. Bjorn is seen as having the musical gift from his maternal Celtic forebears, and learns to play as he grows up. This links him back to the family of the emerald seal ring with the dolphin insignia, which he is given when he comes of age.