After an expedition of two months in September, October, and November, 1902, among the people of northern Luzon it was decided that the Igorot of Bontoc pueblo, in the Province of Lepanto-Bontoc, are as typical of the primitive mountain agriculturist of Luzon as any group visited, and that ethnologic investigations directed from Bontoc pueblo would enable the investigator to show the culture of the primitive mountaineer of Luzon as well as or better than investigations centered elsewhere.

Accompanied by Mrs. Jenks, the writer took up residence in Bontoc pueblo the 1st of January, 1903, and remained five months. The following data were gathered during that Bontoc residence, the previous expedition of two months, and a residence of about six weeks among the Benguet Igorot.

The accompanying illustrations are mainly from photographs. Some of them were taken in April, 1903, by Hon. Dean C. Worcester, Secretary of the Interior; others are the work of Mr. Charles Martin, Government photographer, and were taken in January, 1903; the others were made by the writer to supplement those taken by Mr. Martin, whose time was limited in the area. Credit for each photograph is given with the halftone as it appears.