He had no idea that St Aubyn was an author, and said so.
"What, you didn't know that Roger wrote books ?" said the old lady, turning to him.

"Oh yes, he does, my dear, and very fine books too--only they're miles above the comprehension of stupid old women like me.

Probably you've not a notion what a learned person he really is.

I don't even know the names of the things he writes of." "And you never told me!" said Austin to his friend.

"But you'll have to lend me some of your books now, you know.