That message, though, went against most people's deepest instincts. Mma Makutsi, for example, had no time for snakes, and would not hesitate to dispose of one should she have the chance.

“It's all very well for the Government, Mma Ramotswe,” she said. “Tell me, are there any snakes coming into government offices? These government people do not have to live with snakes as people do in the villages or at the cattle posts. You ask those people out there what to do about snakes and you will get a very different answer.”

She then went on to tell Mma Ramotswe about an incident which she claimed had happened at Bobonong when she was a girl. A large snake-a mamba-had taken up residence in a tree beside a popular path. From one of its branches this snake had dropped down on an old man walking below, with tragic consequences; nobody could survive a mamba bite, least of all an old man. How did Mma Ramotswe think they dealt with the problem?

Mma Ramotswe thought for a moment. “I think that they probably got one of the women to make up a big pot of hot porridge,” said Mma Ramotswe. “Boiling hot. That woman put a cloth on her head and balanced the pot of porridge on top of that. Then she walked under the tree and called out to the snake. Mambas think that very rude. So it dropped down into the porridge and was burned. I imagine that is probably what happened, Mma.”

Mma Makutsi stared at her, wide-eyed. “But that is extraordinary, Mma. That is it exactly. How did you guess?”

Mma Ramotswe smiled, but said nothing. She did not tell Mma Makutsi that this story was an old one, and that she had heard it from one of her aunts, who had presumably heard it from her mother. There were many such stories, and perhaps a long time ago some of them had been true. Now they had acquired the force of truth, innocently enough, and people really believed that these things had happened.