word on the street is that there IS native american in the mountcastle line. I keep hitting a dead end though. I'm getting back to Willis J. Mountcastle(b 1856) who married Eliza webb (b. 1861) apperently SHE is the one who brought the indian into the family, but i can't find anything before her. I'm thinking she was born in westvirginia (at that time was regular virginia still) Let me know if you have any further info.