This feudal lord being involved in the proceedings of the barons in the 17th King John, 1215-16, his castle and lands in Mitford were seized and conferred upon Philip de Ulecotes; but afterwards making his peace, and Philip de Ulecotes not seeming willing to obey the king's mandate in restoring those lands, he was threatened with the immediate confiscation of his own territorial possessions in the cos. of York, Nottingham, and Durham. After this period Roger Bertram appears to have enjoyed the royal favour; and in the 13th of Henry III [1219], when Alexander of Scotland was to meet the English monarch at York, he was one of the great northern barons who had command to attend him thither. He d. in 1241, and was s. by his son, Roger Bertram. [Sir Bernard Burke, Dormant, Abeyant, Forfeited, and Extinct Peerages, Burke's Peerage, Ltd., London, 1883, p. 52, Bertram, Barons Bertram, of Mitford]