Mary A. Seymour (1845-1913) was born in New York and died in Nichols, New York. She became interested in Christian Science in late 1884, eventually taking Primary class with Ellen E. Cross, a student of Mary Baker Eddy's. Later on she studied with Mary Baker Eddy, taking both Primary and Normal class in 1887. Despite completing the Normal class, there is no record of Seymour becoming an authorized teacher of Christian Science or joining The First Church of Christ, Scientist, in Boston, Massachusetts.

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