How does Richard Brautigan use imagery in Richard Brautigan's Trout Fishing in America ; the Pill Versus the Springhill Mine Disaster ; and, in Watermelon Sugar?

Imagery:

"He looked ninety years old for thirty years and then he got the notion that he would die, and did so. The year he died the trout didn't come up Hayman Creek, and never went up the creek again. With the old man dead, the trout figured it was better to stay where they were."

'"It was about dark when I arrived at iDEATH. The two evening stars were now shining side by side. The smaller one had moved over to the big one. They were very close now, almost touching, and then the went together and became one very large star. I don't know if things like that are fair or not.'"