That exploration was made near the end of 1668, the time when the Spaniards were in those parts. Of their doings in detail, only very short and confused accounts have remained. It is only reported that they explored one hundred and fifty villages, from the heights of Cayang to the mountains of Cagayán. Most or them are located on the shores of large rivers, all of which flow into the great river of Cagayán, which empties [into the sea] at Lalo. It is the largest river that is known in all the Filipinas Islands; and is said to be larger than the Danubio [i.e., the Danube.]
The Spaniards did not neglect to look for gold-mines, for the working of which they took along miners and plenty of tools. But although they found mines in the latitude of 17 degrees, from which the Igolotes extract very fine gold, our miners could not obtain any in all the assays that they made; for all went up in smoke. That was one of the reasons that made that conquest drag on, as it was very costly and very remote. The names of the villages which rendered obedience were the following: Cayang, Lobing, Masla, Sumader, Anquiling, Balugan, Maguimey, Tadián, Balococ, Caagitan, Otocan, Bila, Cagubatan, Guindajan, Banaao, Pingar, Pandayan, Naligua, Singa, Banao, Payao, Agava, Lobo, Madaguem, Balicoey, Bilogan, Balicnon, Biacan, Pangpanavil, Gambang, Mogo, Leodan, Dugungan, Sayot, Calilimban, Sanap, Sabangan, Alap, and a valley called Loo, with nine villages. But those which paid something as recognition were Peglisan, Tanon, Maynit, Guinaan, Amtadao, Malibuen, Bucog, Balignono, Balián, Malibcon, Dingle, Datalan, Agava, Malibuen, Talabao, and others--whose names I omit, as they are of little importance, and which exceed one hundred in number.
The governor, in order that that conquest might be made more easily, ordered that the fort of Pignauén be established in Zambales, with a sufficient garrison of soldiers and some small pieces of artillery. As its commandant he appointed Sargento-mayor Blas Rodríguez. Afterward, in the term of Governor Don Juan de Bargas jurisdiction was given to the commandant who then was Captain Alonso Martín Franco; he is still living to govern the villages of Zambales, Nuevo Toledo, and others, in which he places justices and governors. That fort is the check that restrains the raids of the Zambals of Playa Honda, a cruel and barbarous race, who consider their highest good the cutting off of heads, which is their great badge of nobility.