sentences:  He had livery of his lands on 14 November 1361; however, his inheritance was subject to the dower which his father had settled on his stepmother, Elizabeth de Vere.By 1369, his stepmother had married Sir William de Cossington, son and heir of Stephen de Cossington of Cossington in Aylesford, Kent; not long after the marriage, she and her new husband surrendered themselves to the Fleet prison for debt.According to Archer, the cause may have been Mowbray's prosecution of his stepmother for waste of his estates; he had been awarded damages against her of almost £1000.