Nellie S. Thomas (1865-1947) was born in Holden, Maine, and died in Belmont, Massachusetts. She married David W. Thomas, a contractor, in 1883. She joined The First Church of Christ, Scientist, in Boston, Massachusetts, in June 1905. Thomas worked as a Christian Science practitioner and was listed in the directory of The Christian Science Journal from 1906 until 1946. Although she expressed an interest in studying with Mary Baker Eddy, there is no record of her doing so.

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