She knew exactly what he was wearing. He had on a heavy wool robe gathered at the waist by a broad studded belt. His purse was tied to the belt with a leather thong. Over the robe he wore an embroidered surcoat, costly but worn, with yellowing bone buttons down the front. He had done up some of the buttons, but not all, probably out of sleepy laziness, or because the walk from the hospital to the church was so short.

With a touch as light as possible, Gwenda put one small hand on his coat. She imagined her hand was a spider, so weightless that he could not possibly feel it. She ran her spider hand across the front of his coat and found the opening. She slipped her hand under the edge of the coat and along his heavy belt until she came to the purse.

The pandemonium faded as the music grew louder. From the front of the congregation came a murmur of awe. Gwenda could see nothing, but she knew that a lamp had been lit on the altar, illuminating a reliquary, an elaborately carved ivory-and-gold box holding the bones of St Adolphus, that had not been there when the lights went out. The crowd surged forward, everyone trying to get closer to the holy remains. As Gwenda felt herself squashed between Sir Gerald and the man in front of him, she brought up her right hand and put the edge of the knife to the thong of his purse.

The leather was tough, and her first stroke did not cut it. She sawed frantically with the knife, hoping desperately that Sir Gerald was too interested in the scene at the altar to notice what was happening under his nose. She glanced upwards and realized she could just about see the outlines of people around her: the monks and nuns were lighting candles. The light would get brighter every moment. She had no time left.

She gave a fierce yank on the knife, and felt the thong give. Sir Gerald grunted quietly: had he felt something, or was he reacting to the spectacle at the altar? The purse dropped, and landed in her hand; but it was too big for her to grasp easily, and it slipped. For a terrifying moment she thought she was going to drop it and lose it on the floor among the heedless feet of the crowd; then she got a grip on it and held it.

She felt a moment of joyous relief: she had the purse.

But she was still in terrible danger. Her heart was beating so loudly she felt as if everyone must be able to hear it. She turned quickly so that her back was to the knight. In the same movement, she stuffed the heavy purse down the front of her tunic. She could feel that it made a bulge that would be conspicuous, hanging over her belt like an old man’s belly. She shifted it around to her side, where it was partly covered by her arm. It would still be visible when the lights brightened, but she had nowhere else to put it.

She sheathed the knife. Now she had to get away quickly, before Sir Gerald noticed his loss – but the crush of worshippers, which had helped her take the purse unnoticed, now hindered her escape. She tried to step backwards, hoping to force a gap in the bodies behind her, but everyone was still pressing forward to look at the bones of the saint. She was trapped, unable to move, right in front of the man she had robbed.

A voice in her ear said: “Are you all right?”

It was the rich girl. Gwenda fought down panic. She needed to be invisible. A helpful older child was the last thing she wanted. She said nothing.

“Be careful,” the girl said to the people around. “You’re squashing this little girl.”

Gwenda could have screamed. The rich girl’s thoughtfulness would get Gwenda’s hand chopped off.

Desperate to get away, she put her hands on the man in front and shoved, pushing herself backwards. She succeeded only in getting the attention of Sir Gerald. “You can’t see anything down there, can you?” said her victim in a kindly voice; and, to her horror, he grasped her under the arms and lifted her up.

She was helpless. His big hand in her armpit was only an inch from the purse. She faced forward, so that he could see only the back of her head, and looked over the crowd to the altar, where the monks and nuns were lighting more candles and singing to the long-dead saint. Beyond them, a faint light showed through the big rose window at the east end of the building: dawn was breaking, chasing the evil spirits away. The clangour had stopped, now, and the singing swelled. A tall, good-looking monk stepped up to the altar, and Gwenda recognized him as Anthony, the prior of Kingsbridge. Raising his hands in a blessing, he said loudly: “And so, once again, by the grace of Christ Jesus, the evil and darkness of this world are banished by the harmony and light of God’s holy church.”

The congregation gave a triumphant roar, then began to relax. The climax of the ceremony had passed. Gwenda wriggled, and Sir Gerald got the message and put her down. Keeping her face turned away from him, she pushed past him, heading towards the back of the crowd. People were no longer so eager to see the altar, and she was now able to force her way between the bodies. The farther back she went, the easier it became, until at last she found herself by the great west door, and saw her family.

Pa looked expectantly at her, ready to be angry if she had failed. She pulled the purse out of her shirt and thrust it at him, glad to get rid of it. He grabbed it, turned slightly, and furtively looked inside. She saw him grin with delight. Then he passed the purse to Ma, who quickly shoved it into the folds of the blanket that wrapped the baby.

The ordeal was over, but the risk had not yet passed. “A rich girl noticed me,” Gwenda said, and she could hear the shrill fear in her own voice.

Pa’s small, dark eyes flashed anger. “Did she see what you did?”

“No, but she told the others not to squash me, then the knight picked me up so I could see better.”

Ma gave a low groan.

Pa said: “He saw your face, then.”

“I tried to keep it turned away.”

“Still, better if he doesn’t come across you again,” Pa said. “We won’t return to the monks’ hospital. We’ll go to a tavern for our breakfast.”

Ma said: “We can’t hide away all day.”

“No, but we can melt into the crowd.”

Gwenda started to feel better. Pa seemed to think there was no real danger. Anyway, she was reassured just by his being in charge again, and taking the responsibility from her.

“Besides,” he went on, “I fancy bread and meat, instead of the monks’ watery porridge. I can afford it now!”

They went out of the church. The sky was pearly grey with dawn light. Gwenda wanted to hold Ma’s hand, but the baby started to cry, and Ma was distracted. Then she saw a small three-legged dog, white with a black face, come running into the cathedral close with a familiar lopsided stride. “Hop!” she cried, and picked him up and hugged him.

Merthin was eleven, a year older than his brother Ralph; but, to his intense annoyance, Ralph was taller and stronger.

This caused trouble with the parents. Their father, Sir Gerald, was a soldier, and could not conceal his disappointment when Merthin proved unable to lift the heavy lance, or became exhausted before the tree was chopped down, or came home crying after losing a fight. Their mother, Lady Maud, made matters worse, embarrassing Merthin by being over-protective, when what he needed her to do was pretend not to notice. When Father showed his pride in Ralph’s strength, Mother tried to compensate by criticizing Ralph’s stupidity. Ralph was a bit slow on the uptake, but he could not help it, and being nagged about it only made him angry, so that he got into fights with other boys.

Both parents were tetchy on the morning of All Hallows’ Day. Father had not wanted to come to Kingsbridge at all. But he had been compelled. He owed money to the priory, and he could not pay. Mother said they would take away his lands: he was lord of three villages near Kingsbridge. Father reminded her that he was directly descended from the Thomas who became earl of Shiring in the year that Archbishop Becket was murdered by King Henry II. That Earl Thomas had been the son of Jack Builder, the architect of Kingsbridge Cathedral, and Lady Aliena of Shiring – a near-legendary couple whose story was told, on long winter evenings, along with the heroic tales of Charlemagne and Roland. With such ancestry, Sir Gerald could not have his land confiscated by any monk, he bellowed, least of all that old woman Prior Anthony. When he started shouting, a look of tired resignation came over Maud’s face, and she turned away – though Merthin had heard her mutter: “The Lady Aliena had a brother, Richard, who was no good for anything but fighting.”