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Millie and Christine McCoy (1851-1912) were conjoined twins born into slavery. They and their mother were sold to a showman, Joseph Smith. Smith and his wife educated the girls; they eventually could speak five languages, dance, play music, and sing. They were known as the "Two-Headed Nightingale." In the 1880s they retired and purchased a small farm. Millie died of tuberculosis at age 61, with Christine following hours later. They remain one of the oldest-lived set of conjoined twins.
Millie and Christine McCoy, conjoined twins, circa 1880