Mapping old trails has a romantic allure at least as great as the difficulty involved in doing it. In this book, William Foster produces the first highly accurate maps of the eleven Spanish expeditions from northeastern Mexico into what is now East Texas during the years 1689 to 1768. Foster draws upon the detailed diaries that each expedition kept of its route, cross-checking the journals among themselves and against previously unused eighteenth-century Spanish maps, modern detailed topographic maps, aerial photographs, and on-site inspections. From these sources emerges a clear picture of where the Spanish explorers actually passed through Texas. This information, which corrects many previous misinterpretations, will be widely valuable. Old names of rivers and landforms will be of interest to geographers. Anthropologists and archaeologists will find new information on encounters with some 139 named Indian tribes. Botanists and zoologists will see changes in the distribution of flora and fauna with increasing European habitation, and climatologists will learn more about the "Little Ice Age" along the Rio Grande.

In 1718, the Spanish settled San Antonio, partly because of its prolific and breathtaking springs—at that time, one of the largest natural spring systems in the known world. The abundance of fresh water, coupled with the Spanish colonial legal concept that water was to be equitably shared by all settlers, led to the building of the system of acequias (canals or ditches) within the settlement. The system is one of the earliest and perhaps most extensive municipal water systems in North America. This book offers a meticulous chronicling of the origins and often-contentious development of water rights in San Antonio from its Spanish settlement through the beginning of the twentieth century.