sentences:  Mowbray had little financial benefit from his marriage during his lifetime as a result of the very large jointure which had been awarded to Elizabeth's mother, Margaret of Brotherton, Duchess of Norfolk, who lived until 1399.However, when Elizabeth's father, John de Segrave, 4th Baron Segrave, died on 1 April 1353, King Edward III allowed Mowbray to receive a small portion of his wife's eventual inheritance.Estate accounts for 1367 indicate that Mowbray enjoyed an annual income of almost £800 at that time.