Mike- I could find only one BALLENTINE on the Big Spring Presby. records: George married Letitia MARTIN on 11 Apr 1811 in the Newville church. Have you tried a search of the 1810 and 1820 census? I am not sure what was meant by "The Highlands," but Walnut Bottom is a well known name in Cumberland County. It is both a town and a highway. So, if your Walnut Bottom data applies to the town, you should search South Newton Township. (also check JACKSONVILLE as there was a name change). If your Walnut Bottom clue applies to the highway, you must look at every township between Carlisle and Shippensburg on the census. Hope this helps in your search.