The road led out into scrub land, well away from any town. Despite Rafael’s efforts, we were falling farther and farther behind. Eventually the van disappeared over the crest of a rise. By the time we’d topped the rise ourselves, the van was nowhere to be seen. It had disappeared into a region that was dotted with low hills. I wondered if its driver had spotted us, despite our precautions, and had turned his own headlights off.