What mood is created at the beginning of chapter 19? What theme is reinforced in the second paragraph on page 120 and into 121

Huck and Jim continue down the river for a few days. They bask in the fresh air and warm breezes. It is quite an idyllic scene. It is the lifestyle that Huck craves,

"TWO or three days and nights went by; I reckon I

might say they swum by, they slid along so quiet

and smooth and lovely. Here is the way we put in

the time...just like the whole world was asleep, only sometimes

the bullfrogs a-cluttering, maybe. The first thing to

see, looking away over the water, was a kind of dull

line -- that was the woods on t'other side; you

couldn't make nothing else out; then a pale place in

the sky; then more paleness spreading around; then

the river softened up "