This collection documents five generations of the Poor family, members of which were active in the clergy, business and social movements in New England. The collection centers on Henry Varnum Poor (1812-1905), a railroad journalist and economist, and his wife Mary (Pierce) Poor (1820-1912), a participant in social reform movements who for fifty years was minister of the First Church of Brookline, Massachusetts. Also represented are the Pierce family: John Pierce and his wife Lucy (Tappan) Pierce, daughter of Benjamin Tappan, who was a progenitor of the abolitionist family; Lucy (Pierce) Hedge and her husband Frederic Henry Hedge (1805-1890), a transcendentalist minister; Henry Varnum Poor's children, including Henry William Poor (1844-1915), a New York banker; and Henry Varnum Poor's grandchildren. The collection contains correspondence, diaries, financial documents, notebooks, sermons, photos, and clippings. Subjects include social life and customs in New York and New England, Unitarianism, women missionaries, and the rights of women.