The phrase refers to the money Lily's earned from Judy's investment.
Explanation:
'The House of Mirth' is a novel written by Edith Warton. The novel is about the life of Lily Bart and her tragic life at 29 without someone who can secure her financially.
In Book 1, Chapter 10, the given phrase appears. The phrase <em>'traces of Judy Trenor's refurbished splendour'</em> refers to the money Lily's spending that she has earned from Judy Trenor's investment. Lily enjoys her autumn with Mrs. Peniston without anyone's knowledge that the money she have is given by Judy to her.