However, FitzWalter was attacked by Louis de Sancerre and a large French army.

[1] The ransom forced Walter to mortgage his castle and Lordship of Egremont to Alice Perrers, the king's mistress.

As a woman of her time, Alice was obliged to act through male agents, of whom the best-known Thomas de Thelwall, the Chancellor of the Duchy of Lancaster.

[2] He served in John of Gaunt Spanish campaign of 1386, where he died at sea.

He married firstly Eleanor, daughter of Thomas Dagworth and Eleanor de Bohun, Countess of Ormonde, and they are known to have had the following issue: His second marriage was to Philippa, daughter of John de Mohun and Joan Burghersh.