This Day in History: 1381-11-11

On 11th November 1381, John of Gaunt, lord of Pontefract, attended an official service in St Paul’s Cathedral with Henry Percy, Earl of Northumberland, for a commemorative Mass for Gaunt’s first wife, Blanche of Lancaster. Gaunt had earlier challenged Northumberland to a duel as he  had not allowed him to enter his castles in the North-East.