Tannat

Lord Peter, concerning his mother's "detective instinct":

I think my mother’s talents deserve a little acknowledgment. I said so to her, as a matter of fact, and she replied in these memorable words: ‘My dear child, you can give it a long name if you like, but I’m an old-fashioned woman and I call it mother-wit, and it’s so rare for a man to have it that if he does you write a book about him and call him Sherlock Holmes.’

Snicker.

I'm also glad that I recently read Northanger Abbey because otherwise I wouldn't have appreciated a reference to it made earlier.