When Robert Cavelier, sieur de La Salle, landed on the Texas coast in 1685, bent on founding a French colony, his enterprise was doomed to failure. Not only was he hundreds of miles from his intended landfall--the mouth of the Mississippi--but his supply ship, Aimable, was wrecked at the mouth of Matagorda Bay, leaving the colonists with scant provisions and little protection against local Indian tribes. In anger and disgust, he struck out at the ship's captain, Claude Aigron, accusing him of wrecking the vessel purposely and maliciously.

Captain Aigron and his crew...

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 Rio 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...