 Maduit and the castle's garrison took part in the Battle of Old Byland in North Yorkshire in 1322, and the garrison was subsequently increased to 130 men, predominantly light horsemen, and formed a key part of the northern defences against the Scots.By 1326, the castle was given back to Thomas's brother, Henry of Lancaster, with Lilburn returning as its constable, and continued to be of use in defence against the Scottish invasions over the next few decades.Dunstanburgh Castle was acquired by John of Gaunt through his marriage to Henry of Lancaster's granddaughter, Blanche, in 1362.