Answer:
My Mother's only ray of hope came of Dickens's "American Notes"
Explanation:
Douglas thinks Mrs.Auld was not cruel before she became a slave holder
Douglas believes that slavery was very destructive towards Mrs. Auld
Douglas realized that Mrs. Auld was as insecure and eager to please her husband.
My brother posted this question and got this answer hope it helps!
I don't know the full story behind that but repetitive, rhythmic sound, makes me think they are talking about the old mans breathing.
But i'm not sure