Winner, Presidio La Bahia Award, Sons of the Republic of Texas, 1978 In their efforts to assert dominion over vast reaches of the (now U.S.) Southwest in the seventeenth century, the Spanish built a series of far-flung missions and presidios at strategic locations. One of the most important of these was San Juan Bautista del Río Grande, located at the present-day site of Guerrero in Coahuila, Mexico. Despite its significance as the main entry point into Spanish Texas during the colonial period, San Juan Bautista was generally forgotten until the first publication of this book in 1968. Weddle's narrative is a fascinating chronicle of the many religious, military, colonial, and commerical expeditions that passed through San Juan and a valuable addition to knowledge of the Spanish borderlands. It won the Texas Institute of Letters Amon G. Carter Award for Best Southwest History in 1969.

The Rio Grande was ancient long before the first humans reached its banks. These days, the highly regulated river looks nothing like it did to those early settlers. Alternately viewed as a valuable ecosystem and life-sustaining foundation of community welfare or a commodity to be engineered to yield maximum economic benefit, the Rio Grande has brought many advantages to those who live in its valley, but the benefits have come at a price. This study examines human interactions with the Rio Grande from prehistoric time to the present day and explores what possibilities remain for the desert river. From the perspectives of law, development, tradition, and geology, the authors weigh what has been gained and lost by reining in the Rio Grande.