She made her way towards the house, and as she did so she felt that she was being watched. There was no movement, but eyes were upon her, eyes from within the house. At the wall, in accordance with custom, she stopped and called out, announcing herself.

"I am very hot," she said. "I need water." There was no reply from within the house, but a rustle to her left, amongst the bushes. She turned round, almost guiltily, and stared. It was a large black beetle, a setotojane, with its horny neck, pushing at a minute trophy, some insect that had died of thirst perhaps. Little disasters, little victories; like ours, she thought; when viewed from above we are no more than setotojane. "Mma?"

She turned round sharply. A woman was standing in the doorway, wiping her hands on a cloth.

Mma Ramotswe stepped through the gateless break in the wall.

"Dumela Mma," she said. "I am Mma Ramotswe." The woman nodded. "Eee. I am Mma Notshi." Mma Ramotswe studied her. She was a woman in her late fifties, or thereabouts, wearing a long skirt of the sort which the Herero women wore; but she was not Herero-she could tell.

"I have come to see your husband," she said. "I have to ask him for something."

The woman came out from the shadows and stood before Mma Ramotswe, peering at her face in a disconcerting way.

"You have come for something? You want to buy something from him?"

Mma Ramotswe nodded. "I have heard that he is a very good doctor. I have trouble with another woman. She is taking my husband from me and I want something that will stop her."

The older woman smiled. "He can help you. Maybe he has something. But he is away. He is in Lobatse until Saturday. You will have to come back some time after that."

Mma Ramotswe sighed. "This has been a long trip, and I am thirsty. Do you have water, my sister?"

"Yes, I have water. You can come and sit in the house while you drink it."

IT WAS a small room, furnished with a rickety table and two chairs. There was a grain bin in the corner, of the traditional sort, and a battered tin trunk. Mma Ramotswe sat on one of the chairs while the woman fetched a white enamel mug of water, which she gave to her visitor. The water was slightly rancid, but Mma Ramotswe drank it gratefully.

Then she put the mug down and looked at the woman.

"I have come for something, as you know. But I have also come to warn you of something."

The woman lowered herself onto the other chair.

"To warn me?"

"Yes," said Mma Ramotswe. "I am a typist. Do you know what that is?"

The woman nodded.

"I work for the police," went on Mma Ramotswe. "And I have typed out something about your husband. They know that he killed that boy, the one from Katsana. They know that he is the man who took him and killed him for muti. They are going to arrest your husband soon and then they will hang him. I came to warn you that they will hang you also, because they say that you are involved in it too. They say that you did it too. I do not think they should hang women. So I came to tell you that you could stop all this quickly if you came with me to the police and told them what happened. They will believe you and you will be saved. Otherwise, you will die very soon. Next month, I think."

She stopped. The other woman had dropped the cloth she had been carrying and was staring at her, wide-eyed. Mma Ramotswe knew the odour of fear-that sharp, acrid smell that people emit through the pores of their skin when they are frightened; now the torpid air was heavy with that smell.

"Do you understand what I have said to you?" she asked.

The witch doctor's wife closed her eyes. "I did not kill that boy."

"I know," said Mma Ramotswe. "It is never the women who do it. But that doesn't make any difference to the police. They have evidence against you and the Government wants to hang you too. Your husband first; you later. They do not like witchcraft, you know. They are ashamed. They think it's not modern."

"But the boy is not dead," blurted out the woman. "He is at the cattle post where my husband took him. He is working there. He is still alive."

MMA RAMOTSWE opened the door for the woman and slammed it shut behind her. Then she went round to the driver's door, opened it, and eased herself into the seat. The sun had made it burning hot-hot enough to scorch through the cloth of her dress-but pain did not matter now. All that mattered was to make the journey, which the woman said would take four hours. It was now one o'clock. They would be there just before sunset and they could start the journey back immediately. If they had to stop overnight because the track was too bad, well, they could sleep in the back of the van. The important thing was to get to the boy.

The journey was made in silence. The other woman tried to talk, but Mma Ramotswe ignored her. There was nothing she could say to this woman; nothing she wanted to say to her.

"You are not a kind woman," said the witch doctor's wife finally. "You are not talking to me. I am trying to talk to you, but you ignore me. You think that you are better than me, don't you."

Mma Ramotswe half-turned to her. "The only reason why you are showing me where this boy is is because you are afraid.

You are not doing it because you want him to go back to his parents. You don't care about that, do you? You are a wicked woman and I am warning you that if the police hear that you and your husband practise any more witchcraft, they will come and take you to prison. And if they don't, I have friends in Gaborone who will come and do it for them. Do you understand what I am saying?"

The hours passed. It was a difficult journey, out across open veld, on the barest of tracks, until there, in the distance, they saw cattle stockades and the cluster of trees around a couple of huts.

"This is the cattle post," said the woman. "There are two Basarwa there-a man and a woman-and the boy who has been working for them."

"How did you keep him?" asked Mma Ramotswe. "How did you know that he would not run away?"

"Look around you," said the woman. "You see how lonely this place is. The Basarwa would catch him before he could get far."

Something else occurred to Mma Ramotswe. The bone-if the boy was still alive, then where did the bone come from?

"There is a man in Gaborone who bought a bone from your husband," she said. "Where did you get that?"

The woman looked at her scornfully "You can buy bones in Johannesburg. Did you not know that? They are not expensive."

THE BASARWA were eating a rough porridge, seated on two stones outside one of the huts. They were tiny, wizened people, with the wide eyes of the hunter, and they stared at the intruders. Then the man rose to his feet and saluted the witch doctor's wife.

"Are the cattle all right?" she asked sharply.

The man made a strange, clicking noise with his tongue. "All right. They are not dead. That cow there is making much milk."

The words were Setswana words, but one had to strain to understand them. This was a man who spoke in the clicks and whistles of the Kalahari.

"Where is the boy?" snapped the woman.

"That side," replied the man. "Look."

And then they saw the boy, standing beside a bush, watching them uncertainly. A dusty little boy, in torn pants, with a stick in his hand.

"Come here," called the witch doctor's wife. "Come here."

The boy walked over to them, his eyes fixed on the ground in front of him. He had a scar on his forearm, a thick weal, and Mma Ramotswe knew immediately what had caused it. That was the cut of a whip, a sjambok.

She reached forward and laid a hand on his shoulder.

"What is your name?" she asked gently. "Are you the teacher's son from Katsana Village?"