Because to keep it I would have to leave Northumbria and go deep into Wessex. And in Wessex I was Uhtred the Pagan, Uhtred the Godless, Uhtred the Treacherous, Uhtred Ealdordeofol, which means Chief of the Devils, and, most commonly, I was called Uhtredærwe, which simply means Uhtred the Wicked. In Wessex I had powerful enemies and few friends. Which gave me three choices. I could invade with a small army, which would inevitably be beaten, I could go with a few men and risk discovery, or I could break the oath. The first two choices would lead to my death, the third would lead to the shame of a man who had failed to keep his word, the shame of being an oathbreaker.

Eadith, my wife, had no doubts about what I should do. ‘Break the oath,’ she had told me tartly. We had been lying in our chamber behind Bebbanburg’s great hall and I was gazing into the shadowed rafters, blackened by smoke and by night, and I had said nothing. ‘Let them kill each other,’ she had urged me. ‘It’s a quarrel for the southerners, not us. We’re safe here.’ And she was right, we were safe in Bebbanburg, but still her demand had angered me. The gods mark our promises, and to break an oath is to risk their wrath. ‘You would die for a stupid oath?’ Eadith had been angry too. ‘Is that what you want?’ I wanted to live, but I wanted to live without the stain of dishonour that marked an oathbreaker.

Spearhafoc took my mind from the quandary by quickening to a freshening wind and I grasped the steering-oar again and felt the quiver of the water coming through the long ash shaft. At least this choice was simple. Strangers had slaughtered my men, and we sailed to seek revenge across a wind-rippled sea that reflected a myriad flashes of sunlight. ‘Are we home yet?’ Finan asked.

‘I thought you were asleep.’

‘Dozing,’ Finan grunted, then heaved himself upright and stared around. ‘There’s a ship out there.’

‘Where?’

‘There,’ he pointed north. Finan had the sharpest eyesight of any man I’ve ever known. He might be getting older, like me, yet his sight was as keen as ever. ‘Just a mast,’ he said, ‘no sail.’

I stared into the haze, seeing nothing. Then I thought I saw a flicker against the pale sky, a line as tremulous as a charcoal scratch. A mast? I lost it, looked, found it again, and turned the ship northwards. The sail protested until we hauled in the steerboard sheet and Spearhafoc leaned again to the breeze and the water seethed louder down her flanks. My men stirred, woken by Spearhafoc’s sudden liveliness, and turned to look at the far ship.

‘No sail on her,’ Finan said.

‘She’s going into the wind,’ I said, ‘so they’re rowing. Probably a trader.’ No sooner had I spoken than the tiny scratch mark on the hazed horizon disappeared, replaced by a newly dropped sail. I watched her, the blur of the big square sail much easier to distinguish than the mast. ‘She’s turning towards us,’ I said.