Note 2 — Chapter XII · Progress and Revolution. 1837–1897.
Reading edition
The reports of the Dominican missionaries of Nueva Vizcaya and Isabela show the extent and persistence of these raids. (See the files of the missionary publication, El Correo Sino-Annamita, and also the work by Padre Buenaventura Campa, Los Maybyaos y la Raza Ifugao, Madrid, 1895.