With the spring of 1174, however, the strife raged again on all sides. Ireland rose in rebellion. William of Scotland marched into England supported by a Flemish force. Roger Mowbray, and probably the Bishop of Durham, were in league with him. Earl Ferrers fortified his castles in Derby and Stafford; Leicester Castle was still held by the Earl of Leicester's knights; Huntingdon by the Scot king's brother; and the Earl of Norfolk was joined in June by a picked body of Flemings. The king's castles at Norwich, Northampton, and Nottingham, were taken by the rebels, and a formidable line of enemies stretched right across mid-England. At the same time France and Flanders threatened invasion with a strong fleet, and "so great an army as had not been seen for many years." Count Philip, who had set his heart on the promised Kent, and on winning entrance into the lands of the Cistercian wool-growers of Lincolnshire, swore before Louis and his nobles that within fifteen days he would attack England; the younger Henry joined him at Gravelines in June, and they only waited for a fair wind to cross the Channel.

The justiciars were in an extremity of despair. "Seeing the evil that was done in the land," they anxiously sent messenger after messenger to the king. But Henry had little time to heed English complaints. Richard had declared war in Aquitaine; Maine and Anjou were half in revolt; Louis was on the point of invading Normandy. As a last resource his hard-pressed ministers sent Richard of Ilchester, the bishop-elect of Winchester, whom they knew to be favoured by the king beyond all others, to tell him again of "the hatred of the barons, the infidelity of the citizens, the clamour of the crowd always growing worse, the greed of the 'new men,' the difficulty of holding down the insurrection." "The English have sent their messengers before, and here comes even this man!" laughed the Normans; "what will be left in England to send after the king save the Tower of London!" Richard reached Henry on the 24th of June, and on the same day Henry abandoned Normandy to Louis' attack, and made ready for return. "He saw that while he was absent, and as it were not in existence, no one in England would offer any opposition to him who was expected to be his successor;" and he "preferred that his lands beyond the sea should be in peril rather than his own realm of England." Sending forward a body of Brabantines, he followed with his train of prisoners—Queen Eleanor, Queen Margaret and her sister Adela, the Earls of Chester and of Leicester, and various governors of castles whom he carried with him in chains. In an agony of anxiety the king watched for a fair wind till the 7th of July. At last the sails were spread; but of a sudden the waves began to rise, and the storm to grow ominously. Those who watched the face of the king saw him to be in doubt; then he lifted his eyes to heaven and prayed before them all, "If I have set before my eyes the things which make for the peace of clergy and people, if the King of heaven has ordained that peace shall be restored by my arrival, then let Him in His mercy bring me to a safe port; but if He is against me, and has decreed to visit my kingdom with a rod, then let me never touch the shores of the land."

A good omen was granted, and he safely reached Southampton. Refusing even to enter the city, and eating but bread and water, he pressed forward to Canterbury. At its gates he dismounted and put away from him the royal majesty, and with bare feet, in the garb of a pilgrim and penitent, his footsteps marked with blood, he passed on to the church. There he sought the martyr's sepulchre, and lying prostrate with outstretched hands, he remained long in prayer, with abundance of tears and bitter groanings. After a sermon by Foliot the king filled up the measure of humiliation. He made public oath that he was guiltless of the death of the archbishop, but in penitence of his hasty words he prayed absolution of the bishops, and gave his body to the discipline of rods, receiving three or five strokes from each one of the seventy monks. That night he prayed and fasted before the shrine, and the next day rode still fasting to London, which he reached on the 14th. Three days later a messenger rode at midnight to the gate of the palace where the king lay ill, worn out by suffering and fatigue for which the doctors had applied their usual remedy of bleeding. He forced his way to the door of the king's bedchamber. "Who art thou?" cried the king, suddenly startled from sleep. "I am the servant of Ranulf de Glanville, and I come to bring good tidings."—"Ranulf our friend, is he well?"—"He is well, my lord, and behold he holds your enemy, the King of Scots, captive in chains at Richmond." The king was half stunned by the news, but as the messenger produced Glanville's letter, he sprang from his bed, and in a transport of emotion and tears, gave thanks to God, while the joyful ringing of bells told the good news to the London citizens.

Two great dangers, in fact, had passed away while the king knelt before the shrine at Canterbury. On that very day the Scottish army had been broken to pieces. In the south the fleet which lay off the coast of Flanders had dispersed. On the 18th of July, the day after the good news had come, Henry himself marched north with the army that had been gathered while he lay ill. Before a week was over Hugh Bigod had yielded up his castles and banished his Flemish soldiers. The Bishop of Durham secretly sent away his nephew, the Count of Bar, who had landed with foreign troops. Henry's Welsh allies attacked Tutbury, a castle of the Earl of Ferrers. Geoffrey, the bishop-elect of Lincoln, had before Henry's landing waged vigorous war on Mowbray. By the end of July the whole resistance was at an end. On the last day of the month the king held a council at Northampton, at which William of Scotland stood before him a prisoner, while Hugh of Durham, Mowbray, Ferrers, and the officers of the Earl of Leicester came to give up their fortresses. The castles of Huntingdon and Norfolk were already secured. The suspected Earls of Gloucester and of Clare swore fidelity at the King's Court. Scotland was helpless. A treaty was made with the Irish kings. Wales was secured by a marriage between the prince of North Wales and Henry's sister.

But there was still danger over sea, where the armies of the French and the Flemings had closed round Rouen. On the 8th of August, exactly a month after his landing at Southampton, Henry again crossed the Channel with his unwieldy train of prisoners. As he stood under the walls of Rouen, the besieging armies fled by night. Louis' fancy already showed him the English host in the heart of France, and in his terror he sought for peace. The two kings concluded a treaty at Gisors, and on the 30th of September the conspiracy against Henry was finally dissolved. His sons did homage to him, and bound themselves in strange medieval fashion by the feudal tie which was the supreme obligation of that day; he was now "not only their father, but their liege lord." The Count of Flanders gave up into Henry's hands the charter given him by the young king. The King of Scotland made absolute submission in December 1174, and was sent back to his own land. Eleanor alone remained a close prisoner for years to come.

The revolt of 1173-74 was the final ruin of the old party of the Norman baronage. The Earl of Chester got back his lands, but lost his castles, and was sent out of the way to the Irish war; he died before the king in 1181. Leicester humbly admitted "that he and all his holdings were at the mercy of the king," and Henry "restored to him Leicester, and the forest which by common oath of the country had been sworn to belong to the king's own domain, for he knew that this had been done for envy, and also because it was known that the king hated the earl;" but Henry had a long memory, and the walls of Leicester were in course of time thrown down and its fortifications levelled. The Bishop of Durham had to pay 200 marks of silver for the king's pardon, and give up Durham Castle. At the death of Hugh Bigod in 1177 Henry seized the earl's treasure. The Earls of Clare and Gloucester died within two years, and the king's son John was made Gloucester's heir. The rebel Count of Aumale died in 1179, and his heiress married the faithful Earl of Essex, who took the title of Aumale with all the lands on both sides of the water. In 1186 Roger Mowbray went on crusade. The king took into his own hands all castles, even those of "his most familiar friend," the justiciar De Lucy. The work of dismantling dangerous fortresses which he had begun twenty years before was at last completed, and no armed revolt of the feudal baronage was ever again possible in England.

But the rebellion had wakened in the king's mind a deep alarm, which showed itself in a new severity of temper. Famine and plague had fallen on the country; the treasury was well nigh empty; law and order were endangered. Henry hastened to return as soon as his foreign campaign was over, and in May 1175 "the two kings of England, whom a year before the breadth of the kingdom could not contain, now crossed in one ship, sat at one table, and slept in one bed." In token of reconciliation with the Church they attended a synod at Westminster, and went together on solemn pilgrimage to the martyr's tomb. Then they made a complete visitation of the whole kingdom. Starting from Reading on the 1st of June, they went by Oxford to Gloucester, then along the Welsh border to Shrewsbury, through the midland counties by Lichfield and Nottingham to York, and then back to London, having spent on their journey two months and a few days; and in autumn they made a progress through the south-western provinces. At every halt some weighty business was taken in hand. The Church was made to feel anew the royal power. Twelve of the great abbeys were now without heads, and the king, justly fearing lest the monks should elect abbots from their own body, "and thus the royal authority should be shaken, and they should follow another guidance than his own," sent orders that on a certain day chosen men should be sent to elect acceptable prelates at his court and in his presence. The safety of the Welsh marches was assured. The castle of Bristol was given up to the king, and border barons and Welsh princes swore fidelity at Gloucester. An edict given at Woodstock ordered that no man who during the war had been in arms against the king should come to his court without a special order; that no man should remain in his court after the setting of the sun, or should come to it before the sun rising; in the England that lay west of the Severn, none might carry bow and arrow or pointed knife. In this wild border district the checks which prevailed elsewhere against violent crime were unknown. The outlaw or stranger who fled to forest or moorland for hiding, might lawfully be slain by any man who met him. No "murder-fine" was known there. The king, not daring perhaps to interfere with the "liberties" of the west, may have sought to check crime by this order against arms; but such a law was practically a dead letter, for in a land where every man was the guardian of his own life it was far more perilous to obey the new edict than to disregard it.

The king's harsh mood was marked too by the cruel prosecutions of offences against forest law which had been committed in the time of the war. The severe punishments were perhaps a means of chastizing is affected landowners; they were certainly useful in filling the empty treasury. Nobles and barons everywhere were sued for hunting or cutting wood or owning dogs, and were fined sometimes more than their whole possessions were worth. In vain the justiciar, De Lucy, pleaded for justice to men who had done these things by express orders of the king given to De Lucy himself; "his testimony could prevail nothing against the royal will." Even the clergy were dragged before the civil courts, "neither archbishop nor bishop daring to make any protest." The king's triumph over the rebellion was visibly complete when at York the treaty which had been made the previous year with the King of Scotland was finally concluded, and William and his brother did homage to the English sovereigns. A few weeks later Henry and his son received at Windsor the envoys of the King of Connaught, the only one of the Irish princes who had till now refused homage.

In the Church as in the State the royal power was unquestioned. A papal legate arrived in October, who proved a tractable servant of the king; "with the right hand and the left he took gifts, which he planted together in his coffers". His coming gave Henry opportunity to carry out at last through common action of Church and State his old scheme of reforms. In the Assize of Northampton, held in January 1176, the king confirmed and perfected the judicial legislation which he had begun ten years before in the Assize of Clarendon. The kingdom was divided into six circuits. The judges appointed to the circuits were given a more full independence than they had before, and were no longer joined with the sheriffs of the counties in their sessions, their powers were extended beyond criminal jurisdiction to questions of property, of inheritance, of wardship, of forfeiture of crown lands, of advowsons to churches, and of the tenure of land. For the first time the name of Justitiarii Itinerantes was given in the Pipe Roll to these travelling justices, and the anxiety of the king to make the procedure of his courts perfectly regular, instead of depending on oral tradition, was shown by the law books which his ministers began at this time to draw up. As a security against rebellion, a new oath of fealty was required from every man, whether earl or villein, fugitives and outlaws were to be more sharply sought after, and felons punished with harsher cruelty. "Thinking more of the king than of his sheep," the legate admitted Henry's right to bring the clergy before secular courts for crimes against forest law, and in various questions of lay fiefs; and agreed that murderers of clerks, who till then had been dealt with by the ecclesiastical courts, should bear the same punishment as murderers of laymen, and should be disinherited. Religious churchmen looked on with helpless irritation at Henry's first formal victory over the principles of Thomas; in the view of his own day he had "renewed the Assize of Clarendon, and ordered to be observed the execrable decrees for which the blessed martyr Thomas had borne exile for seven years, and been crowned with the crown of martyrdom."

During the next two years Henry was in perpetual movement through the land from Devon to Lincoln, and between March 1176 and August 1177 he summoned eighteen great councils, besides many others of less consequence. From 1178 to 1180 he paid his last long visit to England, and again with the old laborious zeal he began his round of journeys through the country. "The king inquired about the justices whom he had appointed, how they treated the men of the kingdom; and when he learned that the land and the subjects were too much burthened with the great number of justices, because there were eighteen, he elected five—two clerks and three laymen—all of his own household; and he ordered that they should hear all appeals of the kingdom and should do justice, and that they should not depart from the King's Court, but should remain there to hear appeals, so that if any question should come to them they should present it to the audience of the king, and that it should be decided by him and by the wise men of the kingdom." The Justices of the Bench, as they were called, took precedence of all other judges. The influence of their work was soon felt. From this time written records began to be kept of the legal compromises made before the King's Court to render possible the transference of land. It seems that in 1181 the practice was for the first time adopted of entering on rolls all the business which came to the King's Court, the pleas of the Crown and common pleas between subjects. Unlike in form to the great Roll of the Pipe, in which the records of the Exchequer Court had long been kept, the Plea Rolls consisted of strips of parchment filed together by their tops, on which, in an uncertain and at first a blundering fashion, the clerks noted down their records of judicial proceedings. But practice soon brought about an orderly and mechanical method of work, and the system of procedure in the Bench rapidly attained a scientific perfection. Before long the name of the Curia Regis was exclusively applied to the new court of appeal.