How does Lilian Jackson Braun use imagery in The Cat Who Played Post Office?

Examples of Imagery:

"To tell you the truth, Mildred, I'm getting some unsavory vibrations about this case. But I can't say any more- just yet." Jim Qwilleran, Chapter 7, page 116

"That's what happens when I jump to my own conclusions instead of getting my signals from Koko. You know, that cat is ten pounds of bone and muscle in a fur coat, with whiskers and a long tail and a wet nose, but he's smarter than I am."