The Bilanes or Buluanes (Bil-an, Bul-u-an, Bulú-an) [150] reside in the vicinity about the lake of Bulúan and in the mountains between the said lake and the bay of Sarangani. They are the most exploited tribe and the most degraded physically except the Mamanuas. They are fugitive, timid, docile, amiable, and easy to reduce. In two of the islands of Sarangani, Bálud and Tumánao, live also about 1,500 Bilanes who maintain good relations with those of their race in Mindanao, and with the Manobos of Culáman. They occupy color no. 16 on the map.
The Subánon ("people of the river") [151] are a tribe that has become degenerate because of the persecutions which they have had to endure from the Moros who collect large tributes from them. They are husbandmen, but the Moros gain the benefit of their sweat. They are long-suffering and pacific for they are not accustomed to the handling of arms; and they are superstitious and ignorant. Their docility would render their complete reduction very easy. They occupy almost all the peninsula of Sibuguey, and are contiguous to the Moros of Lánao and of the bay of Illana. The latter make use of them, for they enslave them in order to make them work their fields. The military road from Tucúran to Maránding which has been ordered to be built by his Excellency, Captain-general Terrero, [152] will destroy the dominion exercised by the Illanos Moros and those of Lánao over the Subanos, for it will destroy the piracy and captivity because of the impossibility of communication. At the same time it will facilitate the action of the missionaries in the reduction of the said heathens. At the present time there are five reductions of Subanos in the Dapitan district, which have about 2,000 new Christians; another in the Zamboanga district in the jurisdiction of Ayala; while three reductions have already been begun successfully on the bay of Sibuguey, namely, Tupilak, Bulúan, and Bancálan. The Subanos are designated on the map at color no. 17.
The Lutangos Moros are Calibuganes. They are of a timid and peaceful nature and live in Silanga de la Olutanga. They engage in fishing, and have no other dwelling, according to Figueroa, than their vintas in which they live. Each family carries with it its miserable possessions, and they pass years without setting foot on the land for even the fuel that they need is furnished by the mangrove trees. They generally go naked. Their number does not exceed three or four hundred. On the map they occupy color no. 20.