Nellie H. Parker (b. Smith) (1838-1905) was born in Jaffrey, New Hampshire, and died in Cambridge, Massachusetts. She married Daniel W. Parker, a commercial broker, in Lowell, Massachusetts, in 1863, and by 1865 they were living in Cambridge. Parker studied Christian Science with Edward H. Hammond, a student of Mary Baker Eddy, in the spring of 1885 and worked as a Christian Science healer. She then became a student of Eddy herself, completing the Primary Class in March 1888 and joining the Christian Scientist Association that April. She became a member of the Christian Science Mission and Dispensary Association in 1889. Parker joined The First Church of Christ, Scientist, in Boston, Massachusetts, on October 6, 1894.

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