Inscriptions, Al-Jallad explained, tend to cluster on higher ground, where nomadic herders could keep an easier watch for predators. In a landscape with no other traces of human civilization, the rocks preserved the nomads’ names and genealogies, along with descriptions of their animals, their wars, their journeys, and their rituals. There were prayers to deities, worries about the lack of rain, and complaints about the cruelty of Romans.