From the days of Henry II, if not from a yet earlier time, the Crown had found it a hard matter to preserve its authority over castles held in private ownership. Such ownership was limited by the King’s right in three ways. The owner was bound to allow his castle to be garrisoned by the King’s own men at the King’s will; to surrender it into the King’s hand if required; and not to make any addition to its fortifications without the King’s licence. Against the enforcement of these royal rights the owners of castles had struggled, with varying success, under Henry II, Richard, and John. The civil war, and the new conditions under which the powers of the Crown had to be exercised during the minority of John’s successor, had intensified their jealousy of all restriction upon their tenure of their fortresses; and a like spirit of independence began to show itself in some of the wardens of the King’s own castles, with regard to the fortresses under their charge. The only important case of this kind, until the latter part of the year 1219, was that of Count William of Aumale. But between August, 1219, and March, 1220, trouble began to threaten in connexion with two royal fortresses of not less consequence than Sauvey and Rockingham, and from two men of far greater political and personal weight than William de Fors. The combined offices of sheriff of Lincolnshire and warden of Lincoln castle were hereditary in the family of Haye, represented at this time by the old Dame Nicolaa, whose capability, courage, and loyalty had never failed in the service of John and his heir throughout the last twenty years. Three days after the battle of Lincoln {24 May 1217} the city and county had been committed to the boy-King’s uncle, William Longsword Earl of Salisbury, to hold during the King’s pleasure.[682] This grant was probably made with the double purpose of rewarding Longsword for his share in the victory, and relieving Nicolaa of a burden which she had, nearly two years before, declared to be too great for her.[683] Five months later, however, when peace was made, the old lady asked to be reinstated in her hereditary functions. Her request was granted, and on 31st October the Earl was bidden to deliver the castle to her and give her seisin of the sheriffdom without delay; but the latter half of this order seems not to have been enforced;[684] and at the beginning of December the county “with all its appurtenances” was again committed to William to hold during the King’s pleasure.[685] This time, however, the castle did not go with the shrievalty; for from March, 1218, onwards we find the former once more, with the full sanction of the Crown, under the charge of its veteran castellan, Nicolaa.[686] No one seems to have ventured on molesting her till three months after the death of the old Earl Marshal. Then, on 23rd August, 1219, “the sheriff of Lincoln”--no doubt the Earl of Salisbury’s deputy--had to be sharply told that he was to “maintain, protect, and