We have no definite information as to Warwick's doings in the spring of 1463, but we cannot doubt that it was by his counsel and consent that in April his brother the Chancellor and his friend Lord Wenlock, in company with Bourchier Earl of Essex, went over-sea to Flanders, and contracted with Philip Duke of Burgundy a treaty of commercial intercourse and a political alliance. Philip then conveyed the English ambassadors to the Court of Louis of France, who was lying at Hesdin, and with him they negotiated a truce to last from October 1st till the new year. This was to be preliminary to a definite peace with France, a plan always forward in Warwick's thoughts, for he was convinced that the last hope of Lancaster lay in the support of Louis, and that peace between Edward and the French King would finally ruin Queen Margaret's plans.

But while George Neville and the Burgundians were negotiating, a new and curious development of this period of lingering troubles had commenced. Once more the Lancastrians were up in arms, and again the evil began in Northumberland. Sir Ralph Grey had been promised, as we mentioned above, the governorship of Alnwick, and had failed to receive it when the castle fell. This so rankled in his mind that he determined to risk his fortunes on an attempt to seize the place by force and deliver it up again to the Queen. In the end of May he mastered the castle by treachery, and sent for the Lancastrians from over the Border. Lord Hungerford came up, and once more received command of the castle which he had evacuated five months before. The news of this exploit of Grey's was too much for the loyalty of Sir Ralph Percy, the renegade governor of Bamborough. When de Brézé and Hungerford came before his gates he deliberately surrendered the castle to them without resistance.

The exasperating news that the North was once more aflame reached Warwick as he banqueted with King Edward at Westminster on May 31st. With his customary energy the Earl set himself to repair the mischief before it should spread farther. On June 2nd he was once more marching up the Great North Road, with a new commission to act as the King's lieutenant in the North, while his brother Montagu was named under him Lord Warden of the Marches. Warwick's plan of campaign this time was not to reduce the castles at once, but to cut off the Lancastrians from their base by forcing the Scots to conclude peace. Accordingly he left the strongholds on his right and made straight for the Border. His first exploit was to relieve Norham Castle, on the English side of the Tweed, which was beset by four thousand Scotch borderers, aided by Peter de Brézé and his mercenaries. Queen Margaret herself was in their camp, and had dragged her unfortunate consort down to the seat of war. When the English appeared, the Scots and French raised the siege and retired behind the Tweed, where they set themselves to guard the ford called the Holybank. But Warwick was determined to cross; he won the passage by force of arms, and drove off its defenders. A few miles across the Border he found de Brézé's Frenchmen resting in an abbey, and fell on them with such vehemence that several hundreds were taken prisoners, including the Lord of Graville and Raoul d'Araines, de Brézé's chief lieutenants.

One chronicler records a curious incident at this fight. "At the departing of Sir Piers de Bressy and his fellowship, there was one manly man among them, that purposed to meet with the Earl of Warwick; he was a taberette (drummer) and he stood upon a little hill with his tabor and his pipe, tabering and piping as merrily as any man might. There he stood by himself; till my lord Earl came unto him he would not leave his ground." Warwick was much pleased with the Frenchman's pluck, bade him be taken gently and well treated, "and there he became my lord's man, and yet is with him, a full good servant to his lord."

The moment that Warwick was actually across the Tweed, the Scotch regents offered him terms of peace. To prove their sincerity they agreed to send off Queen Margaret. Such pressure was accordingly put upon her that "she with all her Council, and Sir Peter with the Frenchmen, fled away by water in four balyngarys, and they landed at Sluis in Flanders, leaving all their horses and harness behind them, so sorely were they hasted by the Earl and his brother the Lord Montagu."[7] With the horses and harness was left poor King Henry, who for the next two years wandered about in an aimless way on both sides of the Border, a mere meaningless shadow now that he was separated from his vehement consort.

Now at last the Civil War seemed at an end. With Margaret over-sea, Somerset a liegeman of York, the Northumbrian castles cut off from any hope of succour, and the Scots suing humbly for peace, Warwick might hope that his three years' toil had at last come to an end. That, after all, the struggle was to be protracted for twelve months more, was a fact that not even the best of prophets could have predicted.

After the raid which drove Queen Margaret away, and turned the hearts of the Scots toward peace, we lose sight of Warwick for some months. We only know that, for reasons to us unknown, he did not finish his exploits by the capture of the Northumbrian castles, but came home in the autumn, leaving them still unsubdued. Perhaps after the winter campaign of 1462-63 he wished to spend Christmas for once in his own fair castle of Warwick. His estates indeed in Wales and the West Midlands can hardly have seen him since the Civil War recommenced in 1459, and must have required the master's eye in every quarter. His wife and his daughters too, now girls growing towards a marriageable age as ages were reckoned in the fifteenth century, must long have been without a sight of him.

While Warwick was for once at home, and King Edward was making a progress round his kingdom with much pomp and expense, it would seem that Queen Margaret, from the retreat in Lorraine to which she had betaken herself, was once more exerting her influence to trouble England. At any rate a new Lancastrian conspiracy was hatched in the winter of 1463-64, with branches extending from Wales to Yorkshire. The outbreak commenced at Christmas by the wholly unexpected rebellion of the Duke of Somerset. Henry of Beaufort had been so well treated by King Edward that his conduct appears most extraordinary. He had supped at the King's board, slept in the King's chamber, served as captain of the King's guard, and jousted with the King's favour on his helm; yet at mid-winter he broke away for the North, with a very small following, and made for the garrison at Alnwick. Probably Somerset's conscience and his enemies had united to make his position unbearable. The Yorkists were always taunting him behind his back, and when he appeared in public in the King's company a noisy mob rose up to stone him, and Edward had much ado to save his life. But whether urged by remorse for his desertion of Lancaster, or by resentment for his treatment by the Yorkists, Somerset set himself to join the sinking cause at one of its darkest hours.

His arrival in the North, where he came almost alone, for his followers were wellnigh all cut off at Durham, was the signal for the new Lancastrian outbreak. Simultaneously Jasper of Pembroke endeavoured to stir up Wales. A rising took place in South Lancashire and Cheshire, in which at one moment ten thousand men are said to have been in the field: a band set out from Alnwick, pushed by the Yorkist garrison at Newcastle, and seized the Castle of Skipton in Craven, hard by Warwick's ancestral estates in the North Riding; and Norham on the Border was taken by treachery.

In March Warwick set out once more to regain the twice-subdued North. The rising in Cheshire collapsed without needing his arms to put it down, and he was able to reach York without molestation. From thence he sent to Scotland to summon the regency to carry out the terms of pacification which they had promised in the previous year. The Scots made no objection, and offered to send their ambassadors to York if safe escort was given them past the Lancastrian fortresses. Accordingly Montagu started from Durham to pick up his troops at Newcastle, where Lord Scrope was already arrayed with the levies of the Northern Counties. This journey was near being Montagu's last, for a few miles outside Newcastle he was beset by his cousin Sir Humphrey Neville, the Earl of Westmoreland's nephew, who fell on his escort with eighty spears as he passed through a wood. Montagu, however, escaped by a detour and came safely into Newcastle, where he took charge of Scrope's force and marched for the Scotch Border.