This is a true story of discovery and discoverers in what was the northern frontier region of Mexico in the years before the Mexican War. In 1826, when the story begins, the region was claimed by both Mexico and the United States. Neither country knew much about the lands crossed by such rivers as the Guadalupe, Brazos, Nueces, Trinity, and Rio Grande. Jean Louis Berlandier, a French naturalist, was part of a team sent out by the Mexican Boundary...