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In page Mary Sheldon Barnes:

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Mary Downing Sheldon was born in Oswego, New York, the oldest of five children, to Frances Stiles and Edward Austin Sheldon. Her father was the founder of the Oswego State Normal and Training School, known for its Pestalozzian principles. Her upbringing drastically deviated from traditional nineteenth-century norms, as both her parents encouraged scholarly education and fostered her inquisitive spirit. Sheldon attended Oswego public schools and a dual program at Oswego Normal, graduating in 1869 as a certified teacher with specialized training in classical studies.[citation needed]