 For calendric purposes , Bede made a new calculation of the age of the world since the creation , which he dated as <unk> BC . Due to his innovations in computing the age of the world , he was accused of heresy at the table of Bishop Wilfrid , his chronology being contrary to accepted calculations . Once informed of the accusations of these " lewd rustics , " Bede refuted them in his Letter to <unk> . 
