They drove out to Mochudi on the old road, because that was the way that Mma Ramotswe had always travelled and because it was quieter. It was a bright morning, and there was warmth in the air; not the heat that would come in a month or so and build up over the final months of the year, but a pleasant feeling of a benign sun upon the skin. As they left Gaborone behind them, the houses and their surrounding plots gave way to the bush, to the expanses of dry grass dotted with acacia and smaller thorn bushes that were halfway between trees and shrubs. Here and there was a dry river bed, a scar of sand that would remain parched until the rainy season, when it would be covered with swift-moving dun-coloured water, a proper river for a few days until it all drained off and the bed would cake and crack in the sun.

For a while they did not talk. Mma Ramotswe looked out of the window of her tiny white van, savouring the feeling of heading somewhere she was always happy to be going; for Mochudi was home, the place from which she had come and to which she knew that she would one day return for good. Mr. Polopetsi looked straight ahead, at the road unfolding ahead of them, lost in thoughts of his own. He was waiting for Mma Ramotswe to tell him about the reason for their trip to Mochudi; she had simply said at the office that she needed to go there and would tell him all about it on the way up.

He glanced at her sideways. “This business…”

Mma Ramotswe was thinking of something quite different, of this road and of how she had once travelled down it by bus, unhappy to the very core of her being; but that was years ago, years. She moved her hands on the wheel. “We don’t usually get involved in cases where people have died, Rra,” she said. “We may be detectives, but not that sort.”

Mr. Polopetsi drew in his breath. Ever since he had joined the staff of the No. 1 Ladies’ Detective Agency—even in his ill-defined adjunct role—he had been waiting for something like this. Murder was what detectives were meant to investigate, was it not, and now at last they were embarked on such an enquiry.

“Murder,” he whispered. “There have been murders?”