She climbed up and stuck her head and shoulders into the mouth of the oven.

“See?” she said, and her voice echoed within. “There’s room to spare for me, let alone a girl like you.”

The little girl ran at her and with a great push she shoved her into the oven and slammed the door closed. The old woman tried to kick it open again, but the girl was too quick for her, slamming the bolt on it (for the old woman did not want a child to break free once the roasting had begun) and leaving her trapped inside. Then she fed more logs to the fire, and slowly the old woman began to cook, all the time screaming and wailing and threatening the girl with the most awful of tortures. So hot was the oven that the fats of her body began to melt, creating a stench so terrible that the little girl felt ill. Still the old woman fought, even as her skin parted from her flesh, and her flesh from her bones, until at last she died. Then the little girl drew wood from the fire and scattered burning logs around the cottage. She led her brother away by the hand as the house melted behind them, leaving only the chimney standing tall, and they never went back there again.

In the months that followed, the girl grew happier and happier in the forest. She built a shelter, and over time the shelter became a little house. She learned to fend for herself, and as the days went by she thought less and less of her old life. But her brother was never happy and yearned always to be back with his mother. After a year and a day, he left his sister and returned to his old home, but by then his mother and his stepfather were long gone, and no one could tell him where they were. He came back to the forest, but not to his sister, for he was jealous and resentful of her. Instead, he found a path in the woods that was well-tended and cleared of roots and briars, the bushes beside it thick with juicy berries. He followed it, eating some of the berries as he went, never noticing that the path behind him was disappearing with every step that he took.

And after a time he came to a clearing, and in the clearing was a pretty little house, with ivy on the walls and flowers by the door and a trail of smoke rising from its chimney. He smelled bread baking, and a cake lay cooling on the windowsill. A woman appeared at the door, bright and merry, as his mother had once been. She waved to him, inviting him to come to her, and he did.

“Come in, come in,” she said. “You look tired, and berries are not enough to fill a growing boy. I have food roasting over the fire, and a soft place for you to rest. Stay as long as you wish, for I have no children, and have long wanted a son to call my own.”

The boy cast the berries aside as the path behind him vanished forever, and he followed the woman into the house, where a great cauldron bubbled on the fire and a sharp knife lay waiting on the butcher’s block.

And he was never seen again.

THE LIGHT was changing as the Woodsman’s story ended. He looked up at the sky, as if in hope that darkness might be held back for a little longer, and suddenly he stopped walking. David followed his gaze. Above their heads, just at the level of the forest’s crown, David saw a black shape circling and thought that he heard a distant cawing.

“Damnation,” hissed the Woodsman.

“What is it?” asked David.

“A raven.”

The Woodsman removed his bow from his back and notched an arrow to its string. He knelt, sighted, then released the arrow. His aim was true. The raven jerked in the air as the arrow pierced its body, then tumbled to the ground not far from where David stood. It was dead, the point of the arrow red with its blood.

“Foul bird,” said the Woodsman, as he lifted the corpse and pulled the arrow through its body.

“Why did you kill it?” asked David.

“The raven and the wolf hunt together. This one was leading the pack to us. They would have fed our eyes to it as its reward.”

He looked back in the direction they had come.

“They will have to rely on scent alone now, but they are closing on us, make no mistake. We must hurry.”

They continued on their way, moving now at a slight trot, as though they themselves were tired wolves at the end of a hunt, until they reached the edge of the forest and emerged onto a high plateau. Ahead of them lay a great chasm, hundreds of feet deep and a quarter of a mile wide. A river, thin as a length of silver thread, wound through it, and David heard the cries of what might have been birds echoing from the canyon’s walls. Carefully, he peered over the edge of the crevasse in the hope of getting a better look at what was making the noise. He saw a shape, much larger than any bird that he had ever seen, gliding through the air, supported by the updrafts from the canyon. It had bare, almost human legs, although its toes were strangely elongated and curved like an eagle’s talons. Its arms were outstretched, and from them hung the great folds of skin that served as its wings. Its long white hair flowed in the wind, and as David listened, he heard it start to sing. The creature’s voice was very high and very beautiful, and its words were clear to him:

What falls is food,

What drops will die,

Where lives the Brood,

Birds fear to fly.

Its song was taken up and echoed by other voices, and David could make out many more of the creatures moving through the canyon. The one nearest to him performed a loop in the air, at once both graceful and strangely menacing, and David glimpsed its naked body. He looked away immediately, ashamed and embarrassed.

It had a female form: old, and with scales instead of skin, yet still female for all that. He risked another look and saw the creature descending now in diminishing circles, until suddenly its wings folded in, streamlining its form, and it fell rapidly, its clawed feet extended as it seemed to head directly for the canyon wall. It struck the stone, and David saw something struggle in its claws: it was a little brown mammal of some kind, scarcely bigger than a squirrel. Its paws flailed at the air as it was plucked from the rocks. Its captor changed direction and headed for an outcrop beneath David in order to feed, shrieking in triumph. Some of its rivals, alerted by its cries, approached in the hope of stealing its meal, but it struck at the air with its wings in warning and they drifted away. David had an opportunity to examine its face as it hovered: it resembled a woman’s but was longer and thinner, with a lipless mouth that left its sharp teeth permanently exposed. Now those teeth tore into its prey, ripping great chunks of bloody fur from its body as it fed.

“The Brood,” said the Woodsman from nearby. “Another new evil that blights this part of the kingdom.”

“Harpies,” said David.

“You’ve seen such creatures before?” asked the Woodsman.

“No,” said David. “Not really.”

But I’ve read about them. I’ve seen them in my book of Greek myths. For some reason, I don’t think they belong in this story, yet here they are…

David felt ill. He moved away from the edge of the canyon, which was so deep that it gave him vertigo. “How do we get across?” he asked.

“There is a bridge about a half mile downriver,” said the Woodsman. “We’ll make it before the light fades.”

He led David along the canyon, keeping close to the edge of the forest so that there was no danger of them losing their footing and falling into that awful abyss where the Brood waited. David could hear the beating of their wings and, on more than one occasion, he thought he saw one of the creatures briefly ascend above the rim of the canyon and regard them balefully.

“Don’t be afraid,” said the Woodsman. “They are cowardly things. Were you to fall, they would pluck you from the air and tear you apart as they fought over you, but they would not dare to attack you on the ground.”