How we cite our quotes: Citations follow this format: (Act.Scene.Line). Every time a character talks counts as one line, even if what they say turns into a long monologue.
Quote #7
Doaker: "Berniece don't know, but I seen Sutter before she did. […] He was sitting over there at the piano." (2.1.7-2.1.9)
At this point in the play, three characters have seen the ghost – Berniece, Maretha, and Doaker. It's looking more and more likely that Sutter's ghost is real and not just a figment of anyone's imagination. It's too bad those guys from Ghost Hunters weren't around back then; they would've had a field day with this haunted house.
Quote #8
Doaker: "Sutter here cause of that piano. I heard him playing it one time. […] I come out here and ain't seen nobody, but them piano keys was moving a mile a minute." (2.1.13)
Though Berniece is convinced that Sutter's ghost is there because of the piano, Doaker thinks it's the piano that he's after. In Doaker's mind, the ghost has come to reclaim what it thinks it rightfully owns.
Quote #9
Berniece: "Somebody down there pushing them people in their wells. They ain't just upped and fell. Ain't no wind pushed nobody in their well." (2.2.36)
Here's a question: why does Berniece so sure that the Ghosts of the Yellow Dog aren't real? She saw Sutter's ghost, didn't she? She clearly believes in ghosts in general.