How does Shirley Jackson use imagery in We Have Always Lived in the Castle?

Imagery:

"We dusted and swept under tables and chairs and beds and pictures and rugs and lamps, but we left them where they were; the tortoise-shell toilet set on our mother's dressing table was never off place by so much as a fraction of an inch. Blackwoods had always lived in our house, and kept their things in order; as soon as a new Blackwood wife moved in, a place was found for her belongings, and so our house was built up with layers of Blackwood property weighting it, and keeping it steady against the world."

"I wondered how long Charles was going to go on shouting. He made a black noise in our house and his voice was getting thinner and higher; perhaps if he shouted long enough he would squeak."