How does Charles Dickens use imagery in David Copperfield?

Dickens makes wide use of olfactory imagery in the novel, David Copperfield, to paint a picture of his settings. Examples of imagery include;

"smell of fish"

"strange unwholesome smell"

"bad air"

"mouldy air"

Dickens also uses animal imagery to characterize his characters.

a "deep-mouthed and black-haired" dog (Mr. Murdstone)

"....he ordered me like a dog, and I obeyed like a dog".

"Take care of him. He bites."