Emma Helen Blair, The Philippine Islands, 1493–1898 (1903)
“ Because the term "Zambales," in general, comprehends many people to whom the above arguments do not apply, we say that, under the terms Zambales and Negrillos, we understand only those who are nomadic, as above stated. As to whom these may be, we refer to the investigations in detail; it is not for us to judge the information given, but to credit it. This we advance as our opinion, and as such we sign it. Given in the convent of Santo Domingo at Manila, January 1, 92. ”
