Born near Hermosillo in 1819, Don Pascual was in early maturity at the time of Colonel Andrade’s expedition, and was fully conversant with the later history of the Seri. Of adventurous disposition, and holding interests in Bacuachito, he was familiar with the Seri frontier; and in hunting deer and other large game over the vast delta plain of Rio Sonora he had perceived the agricultural possibilities of the region. During the struggle of 1844 he became impressed with the idea that the Seri might be controlled and gradually inducted into useful citizenship through a judicious combination of industrial, educational, and evangelical agencies; and before the end of the year he began the establishment of a rancho (the present Rancho San Francisco de Costa Rica) on the Seri borderland, with the double object of developing new resources and regulating the relations between tribesmen and settlers. Enlisting the aid of a corps of vaqueros, mechanics, and farmers, he excavated a deep well, erected corrals and adobe houses, cleared away the exceptionally luxuriant mesquite forests, fenced fields, and stocked the plains with horses, burros, and cattle. At the same time he sought Seri wanderers and treated them with such kindness and firmness as to gain their confidence; and while most of the tribe held aloof, some attached themselves to the rancho, and a few even were taught to labor; albeit in desultory fashion. In this stage, as for some years afterward, he was materially aided by his contemporary, Kolusio, then in his physical prime and still in good repute among his kinsmen. Meantime he obtained the assignment of two priests, who made it their chief duty still further to placate the tribesmen and their families and to induct them into religious observances and belief; and as the confidence of the Indians increased, he had two boys domiciled in the rancho and educated in the Spanish as well as in the faith, in the hope that they might pass into priesthood and so form a future bond with their kin. One of these neophytes disappeared in the troublous times of a later decade, though tradition indicates that he became a tribal outcast (like Kolusio still later) and slunk away to Pitiquito and Altar, and afterward to California; the other, christened Juan Estorga and nicknamed El Gran Pelado (“The Great Shorn”), survives as subchief Mashém, long since relapsed into his native savagery, save that he remembers the Spanish, affects a hat, cuts his hair to the neck (whence his nickname), and prefers footgear to the fashion of his fellows.