See how the scratches all point straight down the valley, and straight out to sea.

Those mountains are 2000 feet high: but they were much higher once; for the ice has planed the tops off them.

Then, it seems to me, the ice sank, and left the mountains standing out of it about half their height, and at that level it stayed, till it had planed down all those lower moors of smooth bare rock between us and the Western ocean; and then it sank again, and dwindled back, leaving moraines (that is, heaps of dirt and stones) all up these valleys here and there, till at the last it melted all away, and poor old Ireland became fit to live in again.

We will go down the bay some day and look at those moraines, some of them quite hills of earth, and then you will see for yourself how mighty a chisel the ice-chisel was, and what vast heaps of chips it has left behind.

Now then, down over the lawn towards the bridge.