Isabella de Braose let out a whimper of fear. ‘I want to go back.’

‘No, look! Three more paces and we’re there.’ Eleyne, the youngest daughter of Llywelyn, Prince of Aberffraw, and his wife, the Princess Joan, was ten, a year her friend’s junior. By a strange quirk of marriage and remarriage she was also Isabella’s step-great-aunt, a fact which caused the girls renewed giggles whenever they thought about it.

Eleyne gripped Isabella firmly by the wrist and coaxed her forward step by step. They were aiming for the gaping window of the gutted tower to which the new wall abutted. In another week or so the masons would be starting work on renovating it so that it could once again become the focal point of the castle, but as yet it was a deserted, mysterious place, the doors at the bottom boarded up to stop anyone going in amongst the tumbled masonry and charred beams.

‘Why do you want to see it?’ Isabella wailed. She was clinging to the flimsy handrail, her fingers cold and slippery with rain.

‘Because they don’t want us to see what is in there,’ Eleyne replied. ‘Besides, I think there’s a raven’s nest inside the walls.’ Letting go of the other girl’s wrist, she ran along the last few feet of planking and reached the wall of the old tower. Exhilarated by the wind and by the sting of the cold rain on her face, she could hardly contain her excitement. She felt no fear of heights. It had not crossed her mind that she might fall.

‘Come on, it’s easy.’ Peering over her shoulder she narrowed her eyes against the rain. Below, the roofs of Hay huddled around the castle, with here and there a wisp of rain-flattened blue smoke swirling in the darkness. She was very conscious suddenly of the brooding silence beyond the town where the great mass of black mountains stretched on either side of the broad Wye Valley into the heartland of Wales.

‘I can’t do it.’

‘Of course you can. Here.’ Forgetting the mountains, Eleyne ran back to her. ‘I’ll help you. Hold my hand. See. It’s easy.’