After regaining her health she again volunteered as a nurse, but this time with the Christian Sanitary Commission at Harper's Ferry, and as a female. Under a shortened version of her maiden name, S. Emma E. Edmonds, she wrote a fanciful, but highly successful, account of her experiences in the army, Nurse and Spy in the Union Army (1865). The popularity and exposure she gained from the book and its revelation that she had deserted the army at one time led the government to cancel her pension. She later married a childhood neighbor, Linus Seelye, and reportedly had five children, three of whom died in infancy. A congressional bill in 1884 recognized her service to the Union and granted her a pension of twelve dollars a month. The charge of desertion from the army was removed by Congress in 1886.
In the early 1890s the Seelye family moved to La Porte, Texas, and on April 22, 1897, Sarah Seelye became a member of the McClellan Post, Grand Army of the Republic, in Houston, Texas-the only woman member in the history of the GAR, though as many as four hundred women may actually have served in the Union army. At the time of her death Seelye was writing her memoirs of the Civil War. She died in La Porte, Texas, on September 5, 1898. Three years later, at the insistence of her fellow members of the McClellan Post, her remains were transferred to the GAR plot in the Washington (German) Cemetery in Houston.
Her last name is spelled incorrectly on her stone.
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