Found 1850, 1870, 1900, 1910, 1920 and 1930 US Census records from Montgomery Twp., Marion Co., Ohio for this woman that tell a bit of a story about her. She was born in the mid 1840s and apparently kept house with her widowed mother until she was in her mid 30s, at which time she married a much older man whom she outlived by at least 20 years, dying sometime after age 85.
She was born about 1846 the daughter of Sarah Sprague and an unknown father. (though the 1840 Census for Montgomery Twp. shows a William Sprague, almost certainly Emily's father). Apparently her mother was widowed when Emily was a young child because the mother shows up in the 1850 Census as head of a family with daughter Sarah E. Sprague, son W[illiam] H. Sprague, and Emily, only 4 years old. By 1870, Emily was 24, and she and her 63-year-old mother were living together, with another woman Sarah Ball (most likely Emily's older sister Sarah E, perhaps widowed also) and her 7-year-old daughter Ann Ball in the household. By 1900 Emily appears at age 54 as the the wife of Willam Riley, age 76 - over 15 years her senior, and the record shows they were married in 1885. They were married at least 25 years, because in 1910 they show up in the Census a living alone together - he is age 86 and she age 64. She outlived him by some 20 years, because she also appears in the 1920 and 1930 Census records. In 1920 she was living with her elderly brother. In 1930 she was living in La Rue at age 85 with a housekeeper Anna Maze. This woman's life spanned time of great global change - she lived through the Civil War and World War I.