Meanwhile, Coelred and Porlor had not been idle. Porlor had found favour with the Queen's attendants, and persuaded them to prevail upon her to grant him an audience, even at that late hour. He told her what he had discovered from Coifi, and entreated her to save her husband from the shame of perpetrating such a disgraceful crime as was involved in the murder or betrayal of an honoured guest. She promised to do all in her power, telling Porlor to await the result without. Soon afterwards Redwald went to the Queen's apartment. His mind was not made up, although he had wished to satisfy the envoys. His wife now put the matter before him in such dark colours that there was a violent revulsion of feeling. His face was crimson with shame. He left her swearing that not only was Edwin safe, but that he would help him to gain his crown. The Queen then sent for Porlor, and told him the result of her interview.

Coelred and Porlor were overjoyed. They hurried off in search of Edwin, and as they came up to him, Coelred cried out, "Arise. Go in and compose yourself to sleep without fear, for the King's resolution is altered. He designs to do you no harm, but rather to assist you with his power." "Was ever man blessed with truer friends!" cried Edwin, as he embraced the brothers. Next day Edwin related to Coelred his midnight interview with the stranger, which Coelred repeated to the other friends. Forthere greeted it with a loud laugh, and said, "I have seen a monk secretly prowling about, and I recognised him as one I had known before at Monte Cassiano. His name is Paulinus. Redwald allowed him to come, and listened to his discourses several times through an interpreter, but would not permit him to appear in the daytime. The King of the East Anglians wishes to keep on good terms both with Woden and with Christ. Hence this secrecy. The night bird has gone now, and will not be seen again. But mark my words. He is busy hatching a miracle." And Forthere laughed again.

The King of the East Anglians announced his intention of defending his guest, and, if the gods were favourable, of restoring him to his crown. But he said that Ethelfrith was a most formidable antagonist, and that he would give them but little breathing–time. Redwald's fine young sons, Reynhere and Eorpwald, were sent to bring together fighting men as rapidly as possible. Messengers were despatched to Godric, for Lilla and Bassus felt that their hopes must rest on the result of Godric's work during the last year, and on the blunders of Ethelfrith. The news from Godric was excellent. Saebald had arrived at Markham with his Billingas and with the Athelings, Osric and Oswin. Blecca, the great thegn of Lindum, promised to join with the Lindiswaras, and the Gainas were stanch.

The Bernician envoys were dismissed with contumely and defiance. Ethelfrith was furious, and committed every blunder of which an angry man could be guilty. He summoned the Deiran thegns to York, and acted so suspiciously, and with such insolence, that they refused his summons to join him with their men, and remained neutral, if not hostile. Levies came in from Bernicia, and as soon as he had what he considered a sufficient force, the doomed King marched rapidly to the south. He committed the further blunders of despising his enemy and of taking no trouble to ascertain his numbers or his plans. The wild King crossed the Don and marched across the country of the Gainas, direct for Sleaford.

"We must be satisfied with our present force, and with the aid that Godric will bring us, as time will not allow us to wait for further reinforcements," said Bassus, in consultation with the two Kings. "I know the wild King, and he will do everything in haste. We should advance rapidly to Godric's home at Markham, near the river Idle. There will the blow be struck." His advice was taken, and in two days Redwald's army was massed at Markham. Once more Edwin embraced his little boys, and saw his two cousins, Osric and Oswin, for the first time. With himself, the house of Deira now consisted of five male scions.

Lilla and Bassus laid their plans with admirable skill, leaving nothing to chance. The village of Markham is divided from the river Idle by a gentle rising ground. Godric and Blecca were placed half a mile to the north, with the Gainas and Lindiswaras, just below the rise, so as to be out of sight from the river. Redwald's main army was to begin to appear on the rise the moment Ethelfrith reached the river–bank. This would make him hurry his men across furiously, and not until the last man was over was the advance to be made. The river was to be just in rear of the Bernicians. Scouts kept Bassus exactly informed of the enemy's approach. Ethelfrith despised all such precautions. Things fell out exactly as was intended. The wild King shouted and waved his sword when he saw the East Anglians appearing on the crest of the hill. They halted, and, directly the last Bernician was across, Redwald and Edwin advanced resolutely to the attack. Godric alone was visible on the sky–line to the north, and the excited Ethelfrith did not notice him. A desperate hand–to–hand combat commenced. Forthere was in the thick of it. He saw the Bernician King with the glittering gilded boar on his helmet, shouting and calling on his men. The Berserker rage possessed the son of Brand. Furiously dealing blows to right and left, he hewed his way to that gilded boar, and reached it just as Ethelfrith killed the brave young Reynhere and brutally stamped on his body. The two warriors glared at each other. Forthere was a much younger and stronger man. "Niddring and murderer!" he shouted, as he beat down the wild King's guard. "That for Hereric, and that! and that!" and he dealt him three tremendous blows. Ethelfrith was on one knee, and Forthere ran him through.

At the moment when Forthere first descried the helmet with the gilded boar, Godric disappeared from the sky–line. By the time Forthere had crossed swords with Ethelfrith, the Gainas and Lindiswaras were pouring over the hillside and falling furiously on the enemy's left flank. When the wild King was seen to fall, the Bernicians tried to retreat. The river was in their rear, a fresh enemy on their flank. Very few prisoners were taken, and Ethelfrith's forces were nearly annihilated. Next morning Edwin bade farewell to Redwald in a speech full of graceful thanks. The voice of the East Anglian King was broken with grief. He said, "I have opened the road wide for you, my friend. I must now go home to bury my dead. Farewell!"

Lilla urged upon Edwin that if his movements were prompt the whole of Deira and Bernicia could be secured as far as the Forth. Edwin fully concurred. Not an hour must be wasted. He thanked Godric and Blecca warmly for their effective aid, and marched northwards. At first his little force only consisted of Saebald's Billingas and some Gainas under Godric. But the march was like a triumphal procession. By the time he reached York the whole available force of Deira was under his banner. There was scarcely a halt. Osric was left in command at York to restore order, and the King marched rapidly northwards. At Bambrough he found that one of the Bernician thegns had taken all the sons of Ethelfrith and fled with them into the country of the Picts. Edwin lamented the loss of Oswald, his sister's son. Nearly all the other Bernician thegns came into Bambrough and promised obedience. He then advanced to the shores of the Forth, the northern frontier of his dominions. Here he established a settlement, and built a fortress on a high and impregnable rock. It was called Edwins–burg (Edinburgh). When he returned to York, Edwin was undisputed ruler of the great united kingdom of Northumbria, extending from the Humber to the Forth.

The work was not yet done. But there were a few weeks of rest. Lilla was able to visit his beloved Bergliot at Hemingborough, bringing the little Atheling Oswin with him, to be brought up with his own two sons and the Princess Ebba. Coelred strongly advised that a final end should be put to the independence of Elmet, which had become a serious nuisance. He had been at Stillingfleet, and when he returned to the King he found that Coifi was in prison. The friends determined to intercede for him. They remembered the gleeman of their boyhood, he who had taught them the glorious song of Beowulf and all the northern lore, they remembered that Alca had acquitted him, and that his latest treason was atoned for by full confession. At their intercession Edwin contemptuously told Coifi that he was free to return to his images at Godmundham.

A large force was organised for the final conquest of Elmet. The King invited his cousin Braga to accompany him, to take part in a sacred duty. There was little resistance. The Britons fled in a body towards Strathclyde, leaving the country to be settled by the advancing English. At Barwick–in–Elmet the small tumulus hurriedly raised by Forthere over the body of Hereric was found. The beloved remains were embalmed with the frankincense and myrrh brought from Ujjayani, and wrapped in the precious calico and muslin. All his companions, who had loved the Atheling so well, stood round the body of Hereric, with his wife Braga and his two little daughters. There was not a dry eye in the assemblage. King Edwin then ordered that the largest and highest tumulus in the land should be raised above the most noble and the most beloved prince of his race.