Here is a James about the right age, if they were orphans they were probably split up to different familes.  Not at all sure this is him, just casting about.  Mary Ann     9-26-1850 Dist. 19, Summer, TN.  Roll M432_897, Pg. 229B, Image 463 Line 39 #75-74    Realestate  alue  1500.  Does not give occupation or place of birth. James Bowles age 36 Sally age 33 John age 7 James age 5 Oliver age 1