He dropped Morach back on her feet, she stumbled back against the door frame, and turned back towards the cottage, half closing the door.

Alys was looking down from the sleeping platform, her eyes huge in her white face. 'I cannot…' she said.

Morach snatched the shawl from her own shoulders, spread it on the hearth and heaped into it handfuls of herbs, a black-backed prayer-book, four of the twists of powder, a shiny lump of quartz tied up with a long scrap of ribbon, and the pestle and mortar.

'You'll have to try or they'll kill us both,' she said bleakly. 'It's a chance, and a good chance. Others have been cured of the sickness. You'll have to take the gamble.'

'I could run,' Alys said. 'I could hide on the moor for the night.'

'And leave me? I'd be dead by dawn,' Morach said. 'You heard him. He'll burn me alive.'

'They don't want you,' Alys said urgently. 'They would not do that. You could tell them I'm spending the night in Bowes. I could hide by the river, in one of the caves, while they're gone to look for me.'

Morach looked at her hard. 'You've a bitter taste,' she said scowling. 'For all your lovely face you've a bitter taste, Alys. You'd run, wouldn't you? And leave me to face them. You'd rather I died than you took a chance.'

Alys opened her mouth to deny it but Morach thrust the shawl into her hands before she could speak.

'You would gamble with my death, but I will not,' Morach said harshly, pushing her towards the door. 'Out you go, my girl, I'll come to the castle when I can, to get news of you. See what you can do. They grow herbs there, and flowers. You may be able to use your nun's arts as well as mine.'

Alys hefted the bundle. Her whole face was trembling. 'I cannot!' she said. 'I have no skills, I know nothing! I grew a few herbs, I did as I was ordered at the abbey. And your arts are lies and nonsense.'

Morach laughed bitterly. The man outside hammered on the door again. 'Come, wench!' he said. 'Or I will smoke you out!'

'Take my lies and nonsense, and your own ignorance, and use it to save your skin,' Morach said. She had to push Alys towards the door. 'Hex him!' she hissed, as she got the girl over the threshold. 'You have the power, I can feel it in you. You turned the flame blue with your thought. Take your powers and use them now, for your own sake! Hex the old lord into health, Alys, or you and I are dead women.'

Alys gave a little moan of terror and then the man on the horse leaned down and gripped her under both arms and hauled her up before him.

'Come!' he said to his companion and they wheeled their horses around, the hooves tearing up the vegetable patch. Then they were gone into the darkness, and the wind whipped away the noise of the gallop.

Morach waited a while at the cottage doorway, ignoring the cold and the smoke from the doused fire swirling thickly behind her, listening to the silence now that Alys had gone.

'She has power,' she said to the night sky, watching the clouds unravelling past the half-moon. 'She swore that she would go, and in that moment the horses came for her and she was gone. What will she wish for next? What will she wish for next?'

Three

Alys had never been on a galloping horse and she clung to the pommel of the saddle before her, thrown and jolted by the horse's great rolling strides. The wind rushed into her face and the hard grip of the man behind her was that of a jailer. When she looked down she could see the heaving shoulders of the great horse, when she looked forward she saw its tossing mane. They went over the little stone bridge from the moorland road to Castleton with sparks flying upwards from the horses' hooves, and clattered up the cobbled street between the dozen stone-built houses at the same breakneck speed. Not a light showed at any of the shuttered windows, even the smaller houses, set back from the main street on earth roads, and the little shanties behind them on waste ground were dark and silent.

Alys was so shaken that she had no breath to cry out, even when the horse wheeled around to the left and thundered up the drawbridge into the great black maw of the castle gateway. There was a brief challenge from two soldiers, invisible in the darkness of the doorway, and a gruff response from the rider and then they were out into the moonlit castle grounds. Alys had a confused impression of a jumble of stables and farm buildings on her right, the round tower of the guardroom on her left, the smell of pigs, and then they crossed a second drawbridge over a deep stagnant moat, with the noise of the hooves rumbling like thunder on the wooden bridge, and plunged into the darkness of another gateway. The horses halted as two more soldiers stepped forward with a quick word of challenge and stared at the riders and Alys, before waving them through into a garden. Alys could see vegetable-beds and herb-beds and the bare-branched outline of apple trees; but before them, squat and powerful against the night sky, was a long two-storey building with a pair of great double doors set plumb in the centre. Alys could hear the noise of many people shouting and laughing inside. The door opened and a man stepped out to urinate carelessly against the wall; bright torchlight spilled out into the yard and she could smell hot roasted meats. They rode the length of the building, Alys saw the glow of a bakehouse fire in a little round hive of a building set apart from the rest on their right, and then before them were two brooding towers, built with grey stones as thick as boulders, showing no lights.

'Where are we?' Alys gasped, clinging to the man's hands as he thrust her down from the saddle.

He nodded to the tower which adjoined the long building. 'Lord Hugh's tower,' he said briefly. He looked over her head and shouted. An answering cry came from inside the tower and Alys heard a bolt sliding easily back.

'And what's that tower?' she asked urgently. She pointed behind them to the opposing tower, smaller and more squat, set into the high exterior castle wall, with no windows at all at the base and a flight of stone steps running up the outside to the first storey.

'Pray you never know!' the man said grimly. 'That's the prison tower. The first floor is the guardroom, and down below are the cells. They have the rack there, and thumbscrews, a press and bridle. Pray you never see them, wench! You come out more talkative – but taller! Much taller! Thinner! And sometimes toothless!

Cheaper than the toothdrawer at any price!' He laughed harshly. 'Here!' He called a soldier who stepped out of the shadows. 'Here is the wise woman from Bowes. Take her and her bundle to Lord Hugh at once. Let no one tamper with her. My lord's orders!'

He thrust Alys towards the soldier and he grabbed her and marched her up the flight of stone steps to the arched doorway. The door, as thick as a tree trunk, stood open. Inside, a torch flickered, staining the wall behind it with a stripe of black soot. The castle breathed coldness, sweated damp. Alys drew her shawl over her rough cropped head with a shudder. It was colder even than Morach's draughty cottage. Here the castle walls held the wind out, but no sun ever shone. Alys crossed herself beneath her shawl. She had a premonition that she was walking towards mortal danger. The dark corridor before her – lit at the corners with smoking torches – was like her worst nightmares of the nunnery: a smell of smoke, a crackle of flames, and a long, long corridor with no way out.

'Come,' the man said grimly and took Alys' arm in a hard grip. She trailed behind him, up a staircase which circled round and around inside the body of the tower, until he said, 'Here now,' and knocked, three short knocks and two long, on a massive wooden door. It swung open. Alys blinked. It was bright inside, half a dozen men were lounging on benches at a long table, the remains of their supper spread before them, two big hunting dogs growling over bones in the corner. The air was hot with rancid smoke and the smell of sweat. 'A wench!' said one. 'That's kindly of you!' Alys shrank back behind the soldier who still held her. He shook his head. 'Nay,' he said. 'It's the wise woman from Bowes, come to see my lord. Is he well?'

A young man at the far end of the room beckoned them through. 'No better,' he said in an undertone. 'He wants to see her at once.'

He pulled back a tapestry on the wall behind him and swung open a narrow arched door. The soldier released Alys and thrust her bundle into her hands. She hesitated.

'Go on,' the young man said.

She paused again. The soldier behind her put his hand in the small of her back and pushed her forward. Alys, caught off balance, stumbled into the room and past the watching men. Before her, through the door, was a flight of shallow stone steps lit by a single guttering torch. There was a small wooden door at the head of the flight of stairs. As she climbed up, it slowly opened.

The room was dark, lit only by firelight and one pale wax candle standing on a chest by a small high bed. At the head of the bed stood a tiny man, no taller than a child. His dark eyes were on Alys, and his hand smoothed the pillow.

On the pillow was a lean face engraved by sickness and suffering, the skin as yellow as birch leaves in autumn. But the eyes, when the heavy lids flew open and stared at Alys, were as bright and black as an old peregrine falcon.

'You the wise woman?' he asked. 'I have a very little skill,' Alys said. 'And very little learning. You should send for someone learned, an apothecary or even a barber. You should have a physician.'

'They would cup me till I died,' the sick man said slowly. 'They have cupped me till I am near dead already. Before I threw them out they said they could do no more. They left me for dead, girl! But I won't die. I can't die yet. My plans are not yet done. You can save me, can't you?'

'I'll try,' Alys said, pressing her lips on a denial. She turned to the fireplace and laid down Morach's shawl. By the light of the fire she untied the knot and spread out the cloth and arranged the things. The little man came over and squatted down beside her. His head came no higher than her shoulder.

'Do you use the black arts, mistress?' he asked in a soft undertone.

'No!' Alys said instantly, 'I have a very little skill with herbs – just what my mistress has taught me. You should have sent for her.'

The dwarf shook his head. 'In all Bowes they speak of the new young wise woman who came from nowhere and lives with the old widow Morach by the river. He'll have no truck with the black arts,' he said, nodding to the still figure in the bed.

Alys nodded. She straightened the black-bound prayer-book, put the herbs and the pestle and mortar to her right. 'What's that?' the dwarf said, pointing to the stone and ribbon.

'It's a crystal,' Alys said.

At once the little man crossed himself and bit the tip of his thumb. 'To see into the future?' he demanded. 'That's black arts!'

'No,' Alys said. 'To find the source of the illness. Like dowsing for water. Divining for water is not black arts, any child can do it.'

'Aye.' The man nodded, conceding the point. 'Aye, that's true.'

'Have done chattering!' came the sudden command from the bed. 'Come and cure me, wise woman.'

Alys got to her feet, holding the frayed ribbon of the crystal between her finger and thumb so that it hung down like a pendulum. As she moved, the shawl covering her head slid back. The dwarf exclaimed at the stubble of her regrowing hair.

'What have you done to your head?' he demanded. Then his face grew suddenly sly. 'Was it shaved, my pretty wench? Are you a runaway nun, fled from a fat abbey where the old women grow rich and talk treason?'

'No,' Alys said quickly. From the courtyard below the window a cock crowed briefly into the darkness and then settled to sleep again. 'I was sick with a fever in Penrith and they shaved my head,' she said. 'I am not a nun, I don't know what you mean about treason. I am just a simple girl.'

The dwarf nodded with a disbelieving smile, then he skipped to his place at the head of the bed and stroked the pillow again.

Alys drew closer. 'In nomine Patris, et Filii, et Spiritus Sancti,' she muttered under her breath. The stone on the ribbon swung of its own accord in a lazy clockwise arc. 'This is God's work,' Alys said. The stone swung a little wider, a little faster. Alys breathed a little easier. She had never used a pendulum at the abbey, the nuns frowned on it as a supernatural force. The stone was Morach's. By blessing it Alys hoped to stay inside the misty border which separated God's work from that of the devil. But with the old lord glaring at her, and the dwarf's slight malicious smile, she felt in equal danger of burning for heresy as being taken as a witch and strangled.