While Arngrim worked on the farmers’ martial skills, Cynewulf tended to their souls. As the day wore on he baptised one scared farmer after another, hastily splashing their heads with water from wooden cups, and sprinkling holy water on their shields. Evidently not all the population of this part of Wessex was as Christian as he might have imagined. But even if they hadn’t lived in Christ these farmer-warriors would fight and die as Christians.

At the end of the day Alfred’s priests led a long evening of fasting, praying and the singing of hymns and psalms. The camp became an open-air cathedral of Christian piety. Alfred himself was at the centre of this, as tireless in his worship as he had been in preparation for the battle. He was the first to dedicate his life and his victory to God, swearing oaths on a Bible and on the holy sacrament, and he sang until his voice was scratchy with fatigue.

But these final services were conducted under high gibbets on which dangled the corpses of Danes, captured, drained of their useful information, and then summarily hanged. Alfred was pious, but he was a warrior-king.

Not all Alfred’s thegns were Christian. Arngrim was nowhere to be seen during these services. With others, he crept off to a bonfire away from the Christian celebrations.

At about midnight, with a couple of his hearth-companions at his side, Alfred left his camp and made for the pagans’ bonfire. Cynewulf was worn out with praying, and yet he was too excited to sleep, and he followed the King.

By the light of their bonfire the pagan thegns with their followers stood around a pit. Arngrim was here, and Cynewulf saw Ibn Zuhr tending Arngrim’s horse, nearly invisible in the dark. As Cynewulf watched, a pig was dragged squealing to the edge of the pit. A brisk sword-stroke slit open the pig’s belly. As grey ropy guts tumbled out of the screaming animal, the thegns took turns to stab it; Arngrim stepped up in his turn and thrust Ironsides into the bloody mess. Then the pig was hurled into the pit. The warriors raised their dripping swords over the hole in the earth and bellowed an oath in a tongue that had come across on Cerdic’s boats: ‘To Woden! To victory! To death!’

As the warriors prepared to drag forward another animal, a goat this time, the King walked forward. The thegns turned to him respectfully.

‘A waste of good pork, that.’

Arngrim smiled. ‘We who fall will enjoy it in the Upperworld with Woden.’

Alfred took his shoulder. ‘If you were Christian you would be my hearth-companion. You know that.’

‘That and if I could read.’