Note 5 — Geographical Relations and History

The great central valley of Abra is far from being a level plain. In places, as about Manabo, Bukay, and Bangued, there are stretches of level land; but, for the most part, the country is rough and broken. This valley is cut off from the sea by the Coast Range of mountains which forms the provincial line between Abra and Ilocos Sur, while another heavy spur forms the northern limits of Abra from Ilocos Sur to the Cordillera Central. Two small and rather difficult passes afford entrance from the coastal plain into the valley, but the chief avenue of communication is the cut through which the Abra river reaches the sea. So narrow is this entrance that, at high water, the river completely covers the floor and often raises its waters ten or fifteen feet up the canyon side. In recent years a road has been cut in the rocks above the flood waters, but even to-day most of the traffic between Abra and Page 238the coast is carried on by means of rafts which are poled up the river.5