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Are you certain that his name was Luke and that he was born in 1841? In the 1880 census, there was a Ballenger household in Precinct 2, Palo Pinto, Texas, with an Amanda (40) who was the wife, and a daughter Isabell (12), among other children (2 sons, 1 daughter). The husband though was LEROY Ballenger, age 61. He and Amanda were both born in Georgia. This certainly sounds like the family you want. (Maybe the man's name was Leroy Luke?) You can look up this record at www.familysearch.org by selecting "Census" on the left, and then just search the 1880 U.S. census, if you've never used the website.