[21] Alejandro Cacho was a native of León, and came from a noble family; he arrived at Manila in the mission of 1690. He was a missionary to various tribes in upper Pampanga (now Nueva Écija), among whom he labored indefatigably for more than forty years. "He formed villages, opened roads, established schools, built churches, and felled groves; and what was but a little while before a gloomy and impenetrable forest afterward burst upon the sight of the astonished traveler as a broad plain, which the directing hand of the indefatigable Augustinian converted into a fertile field and beautiful province, the pride and hope of the new converts. And he accomplished even more; assigned to the missions of Carranglán and Pantabangan (1707) he eagerly devoted himself to the study of the flora in those unknown regions, examining the medicinal virtues of each plant; and as a fruit of his laborious task, besides practicing successfully the art of the physician among his beloved parishioners he left us the works which we mention below." "He is one of the figures which most clearly illustrate what the religious in Filipinas was, in the double conception of priest and maintainer of the Spanish sovereignty in this archipelago." (Pérez.) He died in Carranglán in 1748. The works alluded to are: "A treatise on the medicinal herbs of the mountains of Buhay;" "Origin and customs of those barbarous peoples;" "History of the Augustinian missions among the Italon Ilongots, the Isinais, the Irulis, and the Igolots," during 1704-33; and three maps drawn by Cacho, giving valuable information regarding the habitat of those peoples in central Luzón. Besides these, he wrote catechisms in the languages of those tribes, directions for their government, etc. [22] Spanish, al testud; this word does not appear in the lexicons, and it is impossible to determine its meaning accurately from the text. Testud may be possibly a misprint for testuz, meaning "the hind part of the head;" but it is more probably the mistake of an amanuensis for testiculos, these glands being regarded as the source of virile power. [23] "Isinay is the language spoken by the Igorot of the hills in western Nueva Vizcaya, and by a part of the population of the towns of Aritao, Dupax, and Bambang, who are of Igorot origin, but whose ancestors were converted in the latter half of the eighteenth century." "The name Igorot (in Spanish form, Igorrote) means in several Malayan languages, 'people of the mountains.'... I have adopted it as a general designation for the whole body of primitive Malayan tribes of northern Luzón who are of the same physical type, speak closely allied languages, and present the same grade of culture." (Barrows, in Census of Philippines, i, pp. 471, 472.) See also VOL. XX of this series, pp. 269-279.