And there is an answer to what you asked on board the yacht--What use was there in learning little matters of natural history and science, which seemed of no use at all?
And now, look out again.

Do you see any change in the country?
What?
Why, there to the left.
There are high hills there now, as well as to the right.

What are they?
Chalk hills too.

The chalk is on both sides of us now.

These are the Chilterns, all away to Ipsden and Nettlebed, and so on across Oxfordshire and Buckinghamshire, and into Hertfordshire; and on again to Royston and Cambridge, while below them lies the Vale of Aylesbury; you can just see the beginning of it on their left.