Mary A. Lilly (c.1850-1925) was born in Killgarven, Ireland, and died in Chicago, Illinois. Lilly emigrated to the United States from Ireland in 1865, settling in Chicago. She became interested in Christian Science in 1884, eventually taking Primary class with Roger Sherman, a student of Mary Baker Eddy's. She joined the The First Church of Christ, Scientist, in Boston, Massachusetts, in March 1894 and was a member until her passing.

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