What's a summary of chapter 12 of Lyddie?

Chapter 12 is titled "I Will Not Be a Slave." The chapter begins with Lyddie working on the mill floor. Conditions are terrible, but Lyddie is working above and beyond what other girls are doing. She is doing so well that Mr. Marsden shows her and her work to some visiting foreign dignitaries. Mr. Marsden says that she is "one of our best girls." Readers are then told that all of her unceasing, good work is paying off financially too. Lyddie is making almost $2.50 per week above her $1.75 board rate. She is still working her way through Oliver Twist, and she reads each copied page so often that she practically has them memorized. We get a little narration about how Lyddie is starting to be able to analyze the text and do basic character breakdowns.
About a third of the way into the chapter, Lyddie receives a letter from her mother. The letter is full of bad news and is extremely depressing. It asks Lyddie for money, saying that Agnes and many others have died and Rachel is also not doing well. The letter causes Lyddie to decide to work even harder to earn even more money in order to pay back the family debt. The goal is that the family can eventually be reunited. She takes on four looms all by herself, and she is able to keep up with the increased pace when other girls are not. Prudence, one of Lyddie's roommates, goes home for good. It is mainly for health reasons.
Readers are also told in this chapter that roommate tensions are running a bit higher. Betsy is studying like crazy, and Amelia is driving everybody crazy with her continual talk about the Sabbath and "stretching your souls." Tensions are stretched to the breaking point when Amelia claims that novels, including Oliver Twist, are the "devil's instrument." The conversation eventually moves to working conditions, and Betsy claims that they are all working "like black slaves." Betsy also expresses a possible desire to sign the petition. Lyddie is appalled at the very thought. Girls that sign the petition are blacklisted, and they no longer can earn any money. Lyddie is adamant that she keeps the job and the pace, and she defends the idea that she is not a slave. The argument ends when the curfew bell rings, and the chapter ends at that point too.