South of the valley of the Blackwater the limestone remains only in a few narrow valley bottoms, and we find ourselves in almost continuously broken country, which gets more and more mountainous as we go west- ward. The first portion of the hilly country which we meet is the upland which lies between the Blackwater and Lee valleys in Co. Cork. Through a transverse through valley near its eastern end the main line of railway finds its way southward to Cork.
