How does P.G. Wodehouse use imagery in Thank You, Jeeves?

Imagery:

“I mean, if you're asking a fellow to come out of a room so that you can dismember him with a carving knife, it's absurd to tack a 'sir' on to every sentence. The two things don't go together.”

"You say it’s a fine day, and he goes all white and tense, because you’ve reminded him that it was on a fine day that his wife eloped with the chauffeur.”