They stopped after dusk in a dead farming village of roofless, wind-carved adobe walls. There were thornbushes in the ruins of a corral and a long, creeping gully had split the village threshing ground. The soil in the rudimentary irrigation ditches was so heavily salinized that it gleamed with a salted crust. The deep stone well was dry. People had lived here once—generation after generation, a thousand tribal years.