The expulsion of the Society of Jesus from Spain and its colonies in 1767 was a serious blow to the missions in Mexico and in Central and South America. Not everywhere, however, did the disappearance of the Jesuit missionaries from the scenes of their labors result in the collapse of the missions. The Franciscans, who had been among the pioneer missionaries of Peru and had played a prominent part in carrying the Cross into the most remote wilds of South America, came to the rescue in many places, and, efficiently and successfully, carried on the work of their predecessors. This is true not only with regard to the chief aim of their missionary activity—the Christianization and civilization of their converts — but also with regard to the important task of geographical exploration. Eduard Pöppig, the pupil of the great Alexander von Humboldt, unquestionably a witness above suspicion, who, during his extensive voyages of discovery in South America from 1827 to 1832, followed the mission trails of the Franciscans in Peru, makes the following judgment on their activity: “However well the Jesuits contributed to the civilization of the plain Maynas, however untiring they have been in throwing the first light upon the geography of the confluences of the Marañón (that is, of that part of the Amazon which flows within the Peruvian borders), yet their endeavours are not without counterpart. The Franciscans, probably less favored by the circumstances of time, began their work almost a century later than the former, but the results of their labors, although they lie in ruins, were not smaller, and today still fill us with admiration.”