So why was Æthelstan not the ætheling? Because Æthelhelm spread the rumour, a false rumour, that Æthelstan was a bastard, that Edward had never married his mother. So Æthelstan was exiled to Mercia, where I had met him and where I came to admire the boy. He grew into a warrior, a man of justice, and the only fault I could find in him was his passionate adherence to his Christian god.

And now Edward was sick. Men knew he must die soon. And when he died there would be a struggle between the supporters of Æthelhelm the Younger, who wanted Ælfweard on the throne, and those who knew that Æthelstan would make the better king. Wessex and Mercia, joined in an uncertain union, would be torn apart by battle. And so Æthelstan had asked me to swear an oath. That on King Edward’s death I would kill Æthelhelm and so destroy his power over the nobles who must meet in the Witan to confirm the new king.

And that was why I would need go to Wessex, where my enemies were numerous.

Because I had sworn an oath.

And I had no doubt that Æthelhelm had sent the ships north to weaken me, to distract me, and, with any luck, to kill me.

The four ships appeared in the summer haze. They were wallowing in the summer sea, but as we appeared they hoisted their sails and turned to pursue us.

Banamaðr had dropped her sail so that, as she pretended to flee westwards, the four ships would not see the black eagle that now faced aft. And we, the moment we saw Banamaðr turn, also dropped our sail so that the enemy would not see the wolf’s head of Bebbanburg.

‘Now row!’ Finan called to the benches. ‘Row!’

The summer haze was thinning. I could see the distant sails bellying in the gusting wind and could see they were gaining on Egil, who was only using three oarsmen on each side. To show more oars was to betray that his ship was no merchant’s vessel, but a serpent-ship crammed with men. I wondered for a moment whether I should follow his example, then decided that the four distant ships were unlikely to fear a single warship. They outnumbered us, and I did not doubt that these men had been sent to kill me if they had the chance.

So I would give them the chance.

But would they take it? More urgently, they were gaining on Banamaðr, driven fast by the brisk wind, and I decided to reveal myself, shouting at my crew to hoist the big sail again. The sight of the wolf’s head might give the enemy pause, but surely they must reckon on winning the coming fight, even against Uhtredærwe.

The sail flapped as it rose, boomed in the wind, then was sheeted home, and Spearhafoc leaned into the sea as her speed increased. The oars were brought inboard and the oarsmen pulled on their mail coats and fetched their shields and weapons. ‘Rest while you can!’ I called to them.