The Dumágas, another hybrid race, occupy the eastern slopes of the Sierra Madre from the northern frontier of El Principe district to the Bay of Palanan, where the last Tagal village is situated, the Tagals thinly peopling the shores. But from Palanan to Punta Escarpada the whole coast is in the undisputed possession of the Dumágas. The Dumágas keep up a friendly communication with the few Christian villages near them, and do a small trade with them. They even work on their lands and help in fishing for a small remuneration, generally paid in cotton cloth. They have no known religion, they marry without ceremony, and are said to disregard the ties of kinship. Those who live far from the Christian villages are said to be entirely brutal and devoid of all virtue, for they will sell their own children for a little rice. They are almost irreclaimable from their savage and independent character. Some of these Dumágas live amongst the Irayas and the Catalangánes, two heathen and semi-independent tribes showing signs of Mongolian blood, who occupy a considerable stretch of country in the province of Cagayan between the Rio Grande and the Sierra Madre, say about twenty geographical miles north and south of the 17th parallel. These Dumágas intermarry with the tribes they live amongst, and have adopted their dress, religion, and customs. The Mamanúas, also a hybrid race, inhabit the mountains of the north-east promontory of Mindanao. They are few in number. There were, in 1887, four Jesuit mission stations amongst them, three of which are on Lake Mainit, or Sapongan, as it is called on some maps. The Manguiánes, who are probably a hybrid Negrito-Visaya race, occupy almost the whole interior of Mindoro, up to within two leagues of the coast. There are a few in the mountains of Romblon and Tablas. There are three varieties of these people, those residing near the western coast are much whiter, with lighter hair and full beards. Those living in the centre of the island are of a darker colour, have sloping foreheads and less intelligence, while those of the southern part, by their oblique eyes, aquiline noses and olive colour, show signs of Chinese blood. They are docile and do not fly from civilised man. A primitive agriculture and the collection of jungle produce enables them to obtain from the Christians, in exchange, rice, knives, bells, gongs, tobacco, and buyo. They are not much advanced in religion, but are very superstitious. They believe that the spirits of their ancestors and relations never leave the places where they lived, but remain to protect their descendants and families. There is noted amongst these people a strong sense of morality and honesty, which unfortunately is not recognised by their Christian neighbours, who are accustomed to oppress them with the most exaggerated usury.