Pedro Durán marched with his men by short stages, because of the inconvenience to the infantry and baggage, and for fear of the ambushes which could be set against him in the many defiles that offered along the road. He always had spies who knew the roads, and Pampanga scouts, and friendly Zambals together with Sargento-mayor Blas Rodríguez and the adjutant Francisco de la Jara, and some Spaniards. Without the occurrence of anything worthy of consideration, they arrived at the first two villages of the Igolotes--called Cayang, [140] of one hundred and fifty houses; and Lobing, of a few less. They found these deserted, but they remained there to await the rest of the convoy. The site of Cayang was very pleasant, and suitable for a military post, as it was the nearest to the villages that had been subdued. Consequently, Pedro Durán determined to build a fort for his defense until, by means of the Zambals and Ilocans, the Igolotes should become quieted and reduced to their houses. He treated the natives well, and the soldiers who might transgress by offering them the least injury he punished. Gradually many of the chief Igolotes came, and showed themselves to be obedient, and friends of the Spaniards, and well inclined to profess the evangelical law and be baptized. A church was built of such materials as could be found in those mountains, because of the difficulty of finding bamboo near there. The same and greater difficulty was experienced in building a fort of palisades and a terreplein; for all that land was bare, and had no forests of timber. Therefore it cost the soldiers considerable labor to find timber and bring it from afar, as they did, without any disaster having happened to them. 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.]