What was chapter 9 about in Stepping In The Cracks by Mary Downing Hahn?

Chapter 9 of "Stepping on the Cracks" by Mary Downing Hahn is titled "The Ghost in the Attic." In this chapter, the protagonist, Mariah, continues to explore the mansion and stumbles upon a trunk in the attic that contains items from the old owners. Among these items, Mariah finds a photo album that holds pictures of the former residents and begins to piece together their tragic past.