Henrietta E. Day (1829-1907) was born in Charleston, South Carolina, and died in Chicago, Illinois. She was the niece of prominent abolitionists, Sarah Moore Grimke (1792-1873), Angelina Emily Grimke (1805-1879) and Theodore Dwight Weld (1803-1895). She was also a student of Mary Baker Eddy's, studying with her in September 1881 and joining the Christian Scientist Association in October of the same year. Day briefly maintained a healing practice in Boston, but by the spring of 1882, she had become disillusioned with Christian Science.

See more letters.