who was originally organizing the effort to bring settlers into texas in 1820
Colonel Pedro de Rivera y Villalón
Spanish Texas
Colonel Pedro de Rivera y Villalón 
wiki:13843799
Spanish Texas [SEP] Settlement difficulties
Shortly after Aguayo returned to Mexico, the new viceroy of New Spain, Juan de Acuña, marqués de Casafuerte, was ordered to cut costs accrued for the defense of the northern part of the territory. Acuña appointed Colonel Pedro de Rivera y Villalón to inspect the entire northern frontier. Beginning in what is now California in November 1724, Rivera spent the next three years inspecting the northern frontier, reaching San Antonio in August 1727. His reports of Los Adaes, Presidio Nuestra Señora de Loreto, and the presidio at San Antonio were favorable, but he was unimpressed with Presidio de los Tejas, whose 25 soldiers were guarding empty missions.