what is walpoling, please?

See BranShea's link above, watch, and listen carefully.
Quote:
Cleese: Good Morning.
Palin: Good morning, Sir. Welcome to the National Cheese Emporium!
C: Ah.
P: What can I do for you, Sir?
C: Well, I was, uh, sitting in the public library on Thurmon Street just now, skimming through Rogue Herrys by Hugh Walpole, and I suddenly came over all peckish.
P: Peckish, sir?
C: Esuriant.
P: Eh?
C: 'Ee Ah wor 'ungry-like!
P: Ah, hungry!
C: In a nutshell. And I thought to myself, 'a little fermented curd will do the trick', so, I curtailed my Walpoling activities, sallied forth, and infiltrated your place of purveyance to negotiate the vending of some cheesy comestibles!
P: Come again?
C: I want to buy some cheese.
P: Oh, I thought you were complaining about the mazouki player!
C: Oh, heaven forbid: I am one who delights in all manifestations of the Terpsichorean muse!

Ceci n'est pas un seing.