How does Katherine Anne Porter use imagery in Pale Horse, Pale Rider: Three Short Novels?

Imagery:

"That was the longest and loneliest night and yet it will not end and let the day come. Shall I ever see light again?"

"Above all, though Miranda, no tooth-gnashing, no hair-tearing, it's noisy and unbecoming and it doesn't get you anywhere."

"She sat thus, forever in the pose of being photographed, a motionless image in her dark walnut frame with silver oak leaves in the corners, her smiling gray eyes following one about the room."