"That makes a quarter of a mile square, don't it?"
"I don't know."
"And it makes a quarter of a square mile."
"Well, what of that?"
"You know how many acres there are in a square mile, don't you?"
"Of course I don't! Why should I?"
"Haven't you learned square measure at school?"
"Oh! I went past that long ago. I'm over in percentage."
"Then, you know that six hundred and forty acres make a square mile."
"No, I don't remember any thing about it. I don't expect to remember a thing after I've been past it a little while, and I never do: so I don't see what's the use of learning books at all."