Bandelier, writing in "The Catholic Encyclopedia" (IV-123), tells us that in the district in which Cartagena was situated, "the religious of the Society of Jesus were the first during the Colonial period to found colleges for secondary instruction; eight or ten colleges were opened in which the youth of the country and the sons of Spaniards were educated. In the Jesuit College of Bogotá the first instruction in physics and mathematics was given. In the expulsion of the Jesuits by Charles III the Church in New Granada lost her principal and most efficacious aid to the civilization of the country.... To this day the traveller may see the effects of this arbitrary act, in the immense plains of the regions of Casanare, converted in the space of one century into pasture lands for cattle, but which were once a source of great wealth, and which would have been even more so. It is only within the last ten years that the Catholic Church, owing to the peace and liberty which she now enjoys, has turned her eyes once more to Casanare; a vicariate Apostolic has been erected there, governed by a bishop of the Order of St. Augustine, who with the members of his order labours among the savages and semi-savages of these plains." The first Jesuits, as we have already said, arrived in Mexico in September, 1572. They were sent out at the expense of the king, but as he did nothing more, a wealthy benefactor immediately put his money at their disposal and gave them a site for a college and church. The latter was erected with amazing expedition at a trifling expense, for three thousand Indians who had heard that the Fathers were going to take care of their spiritual welfare worked at it for three months. The structure was declared to be _muy hermoso por dentro_, but as much could not be said of the exterior. It was simply a thatched structure and was long known by the name of Japalteopan. Their college, which took more time, was called St. Ildefonso. Guadalajara, Zacatecas and Oaxaca also became Jesuit centres, while Chihuahua, Sinaloa, Sonora, and, later Lower California were their fields of labor among the savages. It may be noted here that Father Sánchez was one of the presiding engineers in the work of the Nochistongo tunnel on which 471,154 men were employed. The purpose of the work was to drain the valley of Mexico.