Monclova, Conde De
MONCLOVA, CONDE DE (?–?). Don Melchor Portocarrero Lasso de la Vega, Count of Monclova, became viceroy of New Spain on November 30, 1686. As a member of the Council of the Indies, he had come to America with a directive from that body to rid Texas of the French menace caused by La Salle's settlement at Fort St. Louis. Monclova arrived at Veracruz on September 13, 1686.
Full article on the Texas State Historical Association's Handbook of Texas Online