And if any Scotch boy shall read this book, it will tell him presently how to find the marks of them far and wide over his native land.

But as you, my child, care most about this country in which you live, I will show you in any gravel-pit, or hollow lane upon the moor, the marks, not of a glacier, which is an ice- river, but of a whole sea of ice.
Let us come up to the pit upon the top of the hill, and look carefully at what we see there.

The lower part of the pit of course is a solid rock of sand.

On the top of that is a cap of gravel, five, six, ten feet thick.

Now the sand was laid down there by water at the bottom of an old sea; and therefore the top of it would naturally be flat and smooth, as the sands at Hunstanton or at Bournemouth are; and the gravel, if it was laid down by water, would naturally lie flat on it again: but it does not.