I looked up at the stranded boat. ‘Do you need help?’ I asked.

Caddwg offered a humourless laugh. ‘And what help can you give? You and your short arm? Can you caulk a boat? Can you step a mast or bend on a sail?’ He spat. ‘I only have to whistle and I’ll have a score of men helping me. You’ll hear us singing in the morning, and that’ll mean we’re hauling her down the rollers into the water. Tomorrow evening,’ he nodded curtly to me, ‘I’ll look for you at the fort.’ He turned and went back to his hut.

And I went to join Arthur. It was dark by then and all the stars of heaven pricked the sky. A moon shimmered a long trail across the sea and lit the broken walls of the little fort where we would wait for Prydwen.

We had one last day in Britain, I thought. One last night and one last day, and then we would sail with Arthur into the moon’s path and Britain would be nothing but a memory.

The night wind blew soft across the fort’s broken wall. The rusted remnant of the ancient beacon tilted on its bleached pole above us, the small waves broke on the long beach, the moon slowly dropped into the sea’s embrace and the night darkened.

We slept in the small shelter of the ramparts. The Romans had made the walls of the fort out of sand on which they had mounded turf planted with sea grass, and then they had placed a wooden palisade along the wall’s top. The wall must have been feeble even when it had been built, but the fort had never been anything more than a look-out station and a place where a small detachment of men could shelter from the sea winds as they tended the beacon. The wooden palisade was almost all decayed now, and the rain and wind had worn much of the sand wall down, but in a few places it still stood four or five feet high.

The morning dawned clear and we watched as a cluster of small fishing-boats put out to sea for their day’s work. Their departure left only Prydwen beside the sea-lake. Arthur-bach and Seren played on the lake’s sand where there were no breakers, while Galahad walked with Culhwch’s remaining son up the coast to find food. They came back with bread, dried fish and a wooden pail of warm fresh milk. We were all oddly happy that morning. I remember the laughter as we watched Seren roll down the face of a dune, and how we cheered when Arthur-bach tugged a great bunch of seaweed out of the shallows and up onto the sand. The huge green mass must have weighed as much as he did, but he pulled and jerked and somehow dragged the heavy tangle right up to the fort’s broken wall. Gwydre and I applauded his efforts, and afterwards we fell to talking. ‘If I’m not meant to be King,’ Gwydre said, ‘then so be it.’