She felt better immediately for saying this. Mma Makutsi was a hard worker. She had not had much in this life, and she had worked diligently for everything she did have, including her shoes. This was a very distressing time, and if she could be helped through it by indulging her passion for shoes, then that was, perhaps, something that Mma Ramotswe owed her.

Mma Makutsi’s gratitude was plain to see. “Oh, Mma, that is very good news. Why don’t you come with me right now, and we can go and get those boots? And some boots for you too.”

Mma Ramotswe raised her hands in protest. “I do not need boots, Mma. I’ve got my comfortable flat shoes. You could walk across the Kalahari—and back—in those shoes of mine.”

“And what if you stand on a snake, Mma, while you’re walking across the Kalahari? What then?”

“I will be very careful,” said Mma Ramotswe. “I’ve been walking about Botswana for a long time and I have not yet stood on a snake. And we’re not going to the Kalahari. We’re going to the Okavango Delta.”

“Careful, Mma!” Mma Makutsi warned. “There is always a first time for everything. There is something called the law of averages—you may have heard of it. It says that if you haven’t trodden on a snake yet, then you may tread on one soon-soon.”

THEY DROVE IN THE VAN to Riverwalk. There was a small parking incident, in which Mma Ramotswe narrowly avoided scraping the wing of the next-door car, a gleaming piece of German machinery. It was a narrow escape, and Mma Makutsi could not avoid a sharp intake of breath as the two vehicles had their close encounter.

“That car is far too big,” said Mma Ramotswe. “It is taking up too much room. Soon there will be not enough room in Botswana for the rest of us if these big cars keep coming.”

“Maybe we should have given it a bit more room, Mma,” her assistant said. “I’m not criticising your driving, but it is sometimes a good idea to give big cars a bit more room.”

Mma Ramotswe was having none of that. “You are not a big person just because you have a big car. All people are entitled to the same amount of room.”