The first half-hour was spent in piling up the fire, lest she should suffer from the change of room; and she removed at his desire to the other side of the fireplace, that she might be farther from the door. He then sat down by her, and talked scarcely to any one else.

The fire is mentioned several times in this chapter. In this case it is element of Bingley’s concern over Jane’s health and comfort.

Darcy took up a book; Miss Bingley did the same; and Mrs. Hurst, principally occupied in playing with her bracelets and rings, joined now and then in her brother's conversation with Miss Bennet.
People holding books but not getting much reading done AGAIN… Mrs. Hurst and her bracelets and rings are interesting – is she nervous, bored or empty headed?

In the desperation of her feelings, she resolved on one effort more, and turning to Elizabeth, said --
"Miss Eliza Bennet, let me persuade you to follow my example, and take a turn about the room. I assure you it is very refreshing after sitting so long in one attitude."
At this point I started feeling sorry for Caroline. She tries so hard and stands no chance. Her faithful assistant act has gone too far.

Mr. Darcy looked up. He was as much awake to the novelty of attention in that quarter as Elizabeth herself could be, and unconsciously closed his book.
At least this book got read for a few minutes before being put down. I believe this movement is parallel to Elizabeth putting down a book in chapter 8 to listen to conversation about Pemberley.