Mary de Bohun was an heiress whose estates included lands around the Wye Valley and Monmouth. She was twelve when she married Henry Bolingbroke. At the time of his son's birth, Bolingbroke was making his way home from Windsor when he was crossing the Wye at Walford,the news was brought to him. The proud father was so delighted he awarded the ferryman with the monopoly of the ford. 
Soon after his birth the baby was taken from the castle to a village some miles away to be nursed by Joan Waring. In fact, Mary de Bohun seldom saw her child for she died, having given birth to three more sons and two daughters, when she was about twenty-two and her son, the future King Henry V, was about seven. 
 

Source: Leo van de Pas