Note 7 — Geographical Relations and History
Reading edition
That pre-Spanish trade was not restricted to the Ilocos provinces, but was active along the whole northern coast of Luzon has been amply proved by many writers. In fact, the inhabitants of Pangasinan not only had trade relations with Borneo, Japan, and China,7 but it now seems probable that they can be identified as the Ping-ka-shi-lan who, as early as 1406, sent an embassy to China with gifts of horses, silver, and other objects for the emperor Yung-lo.8