John was hereditary Constable of Chester and in 1214 undertook the payment of 7,000 marks to King John, in the space of four years, for livery of the lands of his inheritance, and to be discharged of all his father's debts due to the
Exchequer, further obligating himself by oath, that in case he should ever swerve from his allegiance, and adhere to the king's enemies, all of his possessions should devolve upon the crown, promising also, that he would not marry without the king's licence. By this agreement it was arranged that the king should retain the castles of
Pontefract and
Dunnington, still in his own hands; and that he, the said John, should allow 40 pounds per year, for the custody of those fortresses. But the next year he had Dunnington restored to him, upon hostages. John was one of the earliest who took up arms at the time of
Magna Carta, and was appointed to see that the new statutes were properly carried into effect and observed in the counties of York and Nottingham. He was one of the twenty-five barons charged with overseeing the observance of
Magna Carta in 1215. John was
excommunicated by the Pope. Upon the accession of
King Henry III (1216-1272), he joined a party of noblemen and made a pilgrimage to the Holy Land, and did good service at the
Siege of Damietta (1218–19). In 1232 he was made
Earl of Lincoln and in 1240, Governor of Chester and Beeston Castles. In 1237 his lordship was one of those appointed to prohibit Oto, the pope's prelate, from establishing anything derogatory to the king's crown and dignity, in the council of prelates then assembled; and the same year he was appointed
Sheriff of Cheshire, being likewise constituted Governor of
Chester Castle. In the contest which occurred in 1232 between the king and
Richard Marshal, 3rd Earl of Pembroke, Earl Marshal, Matthew Paris states that the Earl of Lincoln was brought over to the king's party, with
John of Scotland, 7th Earl of Chester, by
Peter des Roches,
Bishop of Winchester, for a bribe of 1,000 marks. ==Marriage and issue==