In 19th-century America, it was assumed that woman patients would be treated by male doctors. The idea of a "woman doctor" was deemed by many to lie somewhere between unfathomable and repugnant. Then along came Susan Dimock. A young North Carolinian who dreamed of becoming a physician, and grew up to practice medicine in Boston, Dimock was not the first American woman to battle the patriarchal medical establishment. But in the 1870s, she was arguably...