Answer:please see below for interpretation.
Explanation: In the short story written by Katherine Mansfield,
The fur contributes to the theme of the story by representing the character MIss Brill who keeps her fur in a dark box and brings it out only to use it on outings.
The fur accumulates dust since it rarely used, and returns back to its location by Miss Brill after use upon returning.. This dust accumulated by the fur signifies that fur is not constantly in use and does not come out of the box, Similar to the character herself who seldomy goes out, like the fur she leaves home for a bit and spends time only to watch others, eavesdrop on their conversations and then returns to her lonely, small , dark room away from the world as before she left to dwell in her loneliness.