M. Anna Osgood (1855-1922) was born in Jefferson, New Hampshire, and died in Philadelphia, Pennsylvania. She became interested in Christian Science in 1884, while living and working as a school teacher in McIndoe Falls, Vermont. She took Primary and Normal class instruction with Mary Baker Eddy in 1886. After studying with Eddy, she practiced in McIndoe Falls before moving, at the request of Eddy, to Philadelphia to help with the growth of Christian Science in that city. Osgood chartered the Philadelphia Institute of Christian Science in 1888, teaching and healing in the city until 1897, when she moved to Walla Walla, Washington. The move to Walla Walla occured because Osgood was placed on probation as a Christian Science teacher in January 1897 after it was discovered she had been cohabiting with a married man, Dr. Francis Tovar. Eddy wanted Osgood to get her personal affairs in order so Osgood could one day continue her work as a Christian Science teacher. In April 1900, at Eddy's request, Osgood was reinstated as a teacher, helping to establish First Church of Christ, Scientist, Walla Walla, and returning to Philadelphia to continue her work as a Christian Science teacher and practitioner. In July 1893, she joined the The First Church of Christ, Scientist, in Boston, Massachusetts, and was a member until her passing.

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