Mary E. Collier (1841-1923) was born in Ohio and died in Lockport, New York. In 1885 she took lessons in Christian Science with Annie V. C. Leavitt, a student of Mary Baker Eddy's. She went on to take the Primary course with Eddy in 1889. Collier lived in Amsterdam, New York, from the late 1880s until sometime before 1900, when she returned to Lockport to live with her nephew, whom she had raised, for the rest of her life. She joined The First Church of Christ, Scientist, in Boston, Massachusetts, on October 5, 1892, and was a member of the Christian Scientist Association, the National Christian Scientist Association, and the General Association of Teachers. Collier was listed as a practitioner in The Christian Science Journal from 1902 to 1909.

See more letters.