A knight - Sir Marmaduke de Thweng
1258 - Fought the Scots
1260-1261 - Granted robes by the King as a royal knight banneret
1262 - On pilgrimage to Santiago
1264 - Captured with the king at the battle of Lewes by Hugh le Despenser
1264 - Paid 700 m. to Despenser as a ransom
1264, 1283 - Fought the Welsh
Held 16 12 knights fee of the Percy family.
Lord of Kilton Castle, Castleton Castle, Kilton Thorp, Kirkleatham.
Lord of Thweng, Lund, Thorpe, Lythum, Morsum
In right of his wife, the heir to Peter Brus, Lord of Danby Castle, Manors of Kirkburne, Southburn, Brotton and Skinningrove and the town of Yarm.
Retired to Castleton Castle leaving Kilton to his heir.