Because Isabel is enslaved and therefore powerless, she doesn’t feel safe speaking up about the chest’s false bottom—after all, there’s no way to guarantee that she won’t be punished for betraying her owners. Ultimately, though, Isabel emerges from this experience physically unscathed, though she’s frightened and anxious. Seeing Lockton arrested like this makes the war feel more real—for Isabel and, apparently, for Madam too.