Dall (Caroline Healey) is born in Boston.

The daughter of Mark and Caroline (Foster) Healey, she was educated privately, moves to Washington, D.C., marries Rev. Charles Henry Appleton Dahl in 1844, and moves with him to various parishes, but returns to Boston in 1854, when her husband leaves to serve as a missionary in Calcutta. She then enters into what her biographer Helen Deese calls a “Boston divorce,” becomes a follower of Rev. Theodore Parker, an author, abolitionist, and advocate for women’s rights. Dall is an organizer of the New England Woman’s Rights Convention in 1859 and a founder of the American Social Science Association in 1865. She moves to Washington, D.C. in 1879, and dies there on December 17, 1912.