How we cite our quotes: (Volume.Chapter.Paragraph)
Quote #4
"O could I know," said she to herself, "what passes in that mind; could I know the thoughts, that are known there, I should no longer be condemned to this torturing suspense!" (2.6.4)
Just hanging out at Udolpho isn't the bad part for Emily. No, it's not knowing what Montoni has done in the past. She can persevere just fine if she knows what's going on in his mind.
Quote #5
She had scarcely strength to remove from the room, and regain her own; and, when arrived there, wanted courage to remain alone. (2.6.46)
It's all this waiting around, then fainting, then waiting around again that's really doing a number on Em's spirits. This is her lowest point in the castle.