The three of them, Robert, Orm and Ali Ibn Hafsun, their guide, sat on little stone benches in the shade of an apple tree, resting bodies weary from the day’s ride from the coast, and sipping a vendor’s sharp-flavoured tea. Saint James’s city was small, shabby, somewhat decayed, as if nobody had repaired a wall or fixed a broken roof tile since the departure of the Romans. But this little square bustled, as pilgrims in travel-stained dress queued to pay homage, children chased chickens, women shopped for food, and men in loose white clothes conducted business in various tongues.

And in the shadow of the squat church, camels groaned and jostled. The camels were extraordinary. Robert thought they looked wrong, somehow, as if put together from bits of other creatures.

Orm laughed at the camels. ‘I always heard that Africa starts on the other side of the Pyrenees. Now I know.’

Ibn Hafsun was studying Robert. About Orm’s age, somewhere in his forties, Ibn Hafsun dressed like a Moor, and yet he had greying blond hair and blue eyes. He seemed to sense Robert’s restlessness. ‘You are distracted, boy. I can see it in the way you gulp down that hot tea, the way your gaze roams over every surface, looking at all and seeing nothing.’

Orm had always said Robert had the spiritual soul of his long-dead mother, Eadgyth, who had once been a hermit. But Robert had the build and temper of his father, who was a soldier. ‘What’s it to you?’ he snapped back, fourteen years old, bristling.

Ibn Hafsun raised his hands. ‘I mean no offence. I am your guide in this strange country. That’s what I’m paid to do. And though I have delivered your body to this place, I’m doing a poor job if I allow your spirit to wander around like a chick that has lost its nest.’ He spoke an accented Latin dialect. Robert had expected everybody to speak Arabic, but there were two tongues in Spain, Arabic and this diverged version of Latin, which the people called aljami or latinia.

‘I’m not a lost chick.’

Ibn Hafsun smiled. ‘Then how do you think of yourself?’

‘I am a pilgrim. And I’m here in this city of Saint James to visit the tomb of the brother of Christ, who came here to die.’

Orm murmured, ‘You must forgive him, Ibn Hafsun. It’s the fashion these days to be pious. A generation after the Conquest, the English kings are forgotten and every boy in England wants to be a warrior of God like King William.’

‘But this is only a way station,’ Ibn Hafsun said innocently to Robert. ‘Your first stop in Spain. Your destination is Cordoba. And as I understand it you are here in Santiago to meet not a long-dead apostle, but a living priest.’