I love this subtle play on the inadvertant heroine aspect of Catherine's time in Bath, as she is left to sit while Isabella goes to dance with James:

The younger Miss Thorpes being also dancing, Catherine was left to the mercy of Mrs. Thorpe and Mrs. Allen, between whom she now remained. She could not help being vexed at the non–appearance of Mr. Thorpe, for she not only longed to be dancing, but was likewise aware that, as the real dignity of her situation could not be known, she was sharing with the scores of other young ladies still sitting down all the discredit of wanting a partner. To be disgraced in the eye of the world, to wear the appearance of infamy while her heart is all purity, her actions all innocence, and the misconduct of another the true source of her debasement, is one of those circumstances which peculiarly belong to the heroine’s life, and her fortitude under it what particularly dignifies her character. Catherine had fortitude too; she suffered, but no murmur passed her lips.

"Catherine had fortitude too!" What a great phrase to describe the mood she must have been in at the time, especially when left to the mercies of Mrs. Thorpe and Mrs. Allen (two people who we know could not and would not ease their young companion's plight). Our accidental heroine continues to bear up under every indignity.