The estuary’s southern shore appeared as a sullen stretch of sand pounded by foam beyond which were dark woods on low hills. The thunder came closer. The sky above distant Lundene was black as night, sometimes split by a jagged stab of lightning. The rain teemed down, and I searched the shore for a landmark, any landmark that I might recognise. The steering-oar, taking all my and Gerbruht’s strength, quivered like a live thing.

‘There!’ I shouted at Gerbruht, pointing. I had seen the island ahead, an island of reeds and mud, and to its left was the wide, wind-whipped entrance to the Swalwan Creek. Spearhafoc pounded on, clawing her way towards the creek’s safety. ‘I had a ship called Middelniht once!’ I bellowed to Gerbruht.

‘Lord?’ he asked, puzzled.

‘She’d been stranded on that island,’ I shouted, ‘on Sceapig! And the Middelniht proved to be a good ship! A Frisian ship! It’s a good omen!’

He grinned. Water was dripping from his beard. ‘I hope so, lord!’ He did not sound confident.

‘It’s a good omen, Gerbruht! Trust me, we’ll be in calmer water soon!’

We plunged on, the ship’s hull shaking with every wave that pounded her, but at last we cleared the island’s western tip where marker withies were being bent flat by the gale, and once in the creek the seas calmed to a vicious chop and we dropped the sodden sail and our oars took us into the wide channel that ran between the Isle of Sceapig and the Centish mainland. I could see farmsteads on Sceapig, the smoke from their roof-holes being whipped eastwards on the wind. The channel narrowed. The wind and rain still beat down on us, but the water was sheltered here and the creek’s banks had tamed the ship-killing waves. We went slowly, the oars rising and falling, and I thought how the dragon-boats must have crept down this waterway bringing savage men to plunder the rich fields and towns of Cent, and how the villagers must have been terrified as the serpent-headed war boats appeared from the river mists. I have never forgotten Father Beocca, my childhood tutor, clasping his hands and praying nightly: ‘From the fury of the Northmen, good Lord, deliver us.’ Now I, a northerner, was bringing swords, spears and shields to Cent.

The priest who had brought me Eadgifu’s message said that though she had announced her pious intention of praying at Saint Bertha’s tomb in Contwaraburg, in truth she had taken refuge in a small town called Fæfresham where she had endowed a convent. ‘The queen will be safe there,’ the priest had told me.

‘Safe! Protected by nuns?’

‘And by God, lord,’ he had reproved me, ‘the queen is protected by God.’

‘But why didn’t she go to Contwaraburg?’ I had asked him. Contwaraburg was a considerable town, had a stout wall, and, I assumed, men to defend it.

‘Contwaraburg is inland, lord.’ The priest had meant that if Eadgifu was threatened by failure, if Æthelhelm discovered her and sent troops, then she wanted to be in a place where she could escape by sea. From where she could cross to Frankia, and Fæfresham was very close to a harbour on the Swalwan Creek. It was, I supposed, a prudent choice.