‘No. But as I told you in my letters it is a dream of freedom that draws me there. Pelagius would approve! A dream, or rather a hint, a tantalising hint of a better future ...’ And he began to speak of family legend and of fragmentary prophecies, of emperors and of history.

But the evening was ending for Isolde. Exhausted by travelling, heavy with food and drink, and with the baby slumbering softly within her, she made her excuses and left for her bed. The old men talked on softly, as young Damon, huddled by the fire, listened as attentively as a puppy before its master.

III

For Isolde the journey north to the Wall was a long and brutal haul along the spine of this dismal island. Following poor roads they passed through town after shabby walled town, and they had to pay more tolls as they crossed invisible provincial boundaries.

Isolde was so immersed in the oceanic aches of her own body she barely noticed the change in the character of the country as they headed north, from the rolling chalk hills of the south with their abandoned farms and fortified country houses, to the more rugged north with its bristling forts. But the further north you went the fewer Saxons you saw. Perhaps the people in the north had found other ways to look after themselves.

They arrived at last at the line of the Wall. Though the paintwork was faded, and in places you could see where damage had been roughly repaired, the Wall was still intact and very impressive, its powerful lines cutting across the neck of the countryside.

And the Wall was manned. Nennius turned westward, planning to travel to a fort called Banna. They soon reached what Nennius called a mile-fort, built around a gate that was roughly blocked with stones. Two grubby soldiers in woollen tunics flagged them down, to extract still more tolls. According to the soldiers the whole line of the Wall was under the command of the ‘Duke of the Britains’. The soldiers gave them a chit scribbled on a wood slip, so they wouldn’t have to pay any further tolls.

Isolde found the Wall and its soldiers, even the process of paying the toll, reassuringly familiar. Sooner this semblance of the Roman way than relying for your protection on the bands of blond-haired barbarian thugs like in the south. But no standard was erected over the mile-fort’s eroded stones; no eagles flew here.

They continued westward, passing more mile-forts and watchtowers, and arrived at Banna. The fort sprawled on an impressive escarpment, and to the south a river with shining gravel banks curled through woodland. The northern wall of the fort was built into the line of the Wall itself. There were houses and other buildings outside the walls of the fort, but they looked abandoned, their roofs missing, walls of mud subsiding back into the earth.