Susanna Boylston Adams Hall died in Quincy, Massachusetts, on April 21, 1797, aged eighty-nine. She had lived long enough to see her eldest son John inaugurated as president only weeks earlier. Abigail Adams remained in Massachusetts during the inauguration partly because of her elderly mother-in-law's condition, placing the death within a period when family care was an immediate concern. The consulted biography does not identify a particular fatal disease or provide a continuous account of symptoms and treatment. Her son Elihu's death from dysentery during the Revolutionary era was a separate event, not her own diagnosis. Family recollections and her obituary preserve the broad outline of a long life and the timing of its close, while the private medical details remain uncertain. No specific cause has been inferred solely from her age, and no unverified final statement has been added.