The Augustinians carry on their missions among the Ilocans, the Tinguians, the Igorots, the Zambals, and the Negritos--this last having stations throughout the islands; also in Cebú and Panay, and in China. Mozo narrates the progress of these missions, but devotes much of his space to accounts of the wild tribes and their peculiar customs and beliefs; this is especially fortunate for our purpose in regard to the Negritos, about whom less has been known than about the other Philippine peoples, Mozo's residence of three years among them rendering his observations extremely valuable. He also gave particular attention to the practices and medicines used by the natives in sickness, and to the plants which are useful therein. Among these missions the most arduous, according to our writer, was that to the "apostates" and infidels who had taken refuge in a certain mountainous and densely-wooded district; these renegades and heathen dwelt together, each making the other worse. Among these people were preserved many of the ancient pagan customs which the missionaries had in most places been able to extirpate; and these are described by Mozo. Even in this hard field, "multitudes of infidels were baptized and hundreds of apostates reclaimed." The Augustinians also conduct missions in the interior of Cebú and Panay, where not only are the mountains rugged and the forests dense, but there are wizards among the natives who "by conversing with the demon do things which cause terror;" some account of their practices is given, as also of the converts gained by missionaries among those people. He then describes some of the medicines that are used by the natives. Among these are the gall and fat of the python; a stone which, when applied to a woman's thigh, would facilitate childbirth; and a plant which intoxicates and infuriates those who go into battle. Another plant temporarily paralyzes the muscular system. Mozo concludes with an account of the Augustinian missions in China, which does not concern our work.