How does Truman Capote use imagery in The Grass Harp?

Imagery:

"She was one of those people who can disguise themselves as an object in the room, a shadow in the corner, whose presence is a delicate happening. She wore the quietest shoes, plain virginal dresses with hems that touched her ankles. Though older than her sister, she seemed someone who, like myself, Verena had adopted. Pulled and guided by the gravity of Verena's planet, we rotated separately in the outer spaces of the house."

"Just entering the woods there was a double-trunked China tree, really two trees, but their branches were so embraced that you could step from one into the other; in fact, they were bridged by a treehouse: spacious, sturdy, a model of a treehouse, it was like a raft floating in the sea of leaves."