This book contains much information regarding the customs and superstitions of the natives, especially of the Negritos, which is valuable not only as being furnished by an educated man who lived among them, but on account of his kindly nature, comparative freedom from bigotry and prejudice, and his inclination to take an impartial and philosophical view of his subject. For this reason, a very full synopsis has been made of his work, and his observations on the natives have been mostly translated in full. He left the islands in 1759, as he states on p. 76 of his book. [15] This mission field was located in the eastern part of what is now the province of Nueva Ecija (formed at the beginning of the nineteenth century), on the Rio Grande of Pampanga and its tributary the Santor, nearly half-way from the source of the former to its mouth; the peoples here mentioned evidently dwelt at first on the heights of the Caraballo de Baler--part of the Caraballo Sur range, from which flow northward the waters of the Magat and the Rio Grande of Cagayan; and southward the Rio Grande and the Rio Chico (respectively "great river" and "little river" of Pampanga). The name "Buquid" apparently simply designates them as dwellers in the mountain forests. The Italons--a name of the same signification, applied by the Gaddans to the Ilongots dwelling in the Caraballo mountains of Nueva Ecija and Príncipe (who are called Ibilao by their Isinay neighbors north of that range)--and Abacas lived on the headwaters of the Rio Grande and Rio Chico. Barrows says (Census of Philippines, i, p. 437): "The Ibilao who inhabit the mountains of Nueva Ecija are among the most persistent head hunters of northern Luzón. Their raids upon the Christian settlements of Nueva Ecija are incessant, and they have repeatedly taken lives in the vicinity of Carranglán and Pantabangán within the last two or three years." (See also ut supra, pp. 470, 471.) [16] In another place this name appears as Alzaga; but Pérez (Catálogo, p. 179) spells it Arziaga. This missionary was a native of Valladolid, and came to the islands in 1699; he died in 1707. [17] For a modern description of the Ilongots (or Italons), see that given in Census of the Philippines, i, pp. 545-547; the writer (L. E. Bennett, governor of Nueva Vizcaya) says: "The chiefs of all these settlements stated to me positively that adultery was unknown among these people, and that their family relations were very closely drawn. They further stated that they never knew of a case of a young woman giving birth before she had been married." "Fighting is never carried on in the open, but they depend entirely upon assassination and ambush. They set pointed bamboos and spring guns for each other in places known to be traveled, and use spears and bows and arrows with poisoned tips when they fight."