at the beginning of part 3 what details show that the mood inside the whites house has changed?

Mr. White and Mrs. White have lost interest in life.They no longer share cozy contented evenings with their son Herbert. They live a life of resigned futility.

But the days passed, and expectation gave place to resignation--the hopeless resignation of the old, sometimes miscalled, apathy. Sometimes they hardly exchanged a word, for now they had nothing to talk about, and their days were long to weariness.