James Wood arrived in Texas in 1851, but did not become a U.S. citizen until November of 1856 according to A.Y. Kirkpatrick in his book “The Early Settlers Life in Texas”. Above is the link to the Kirkpatrick book (to the actual page) where this is documented. I don’t have official paperwork, but will go to the courthouse in Hillsboro eventually to see what I can find.
Meanwhile, I do have a copy of the document where Scotland acknowledges that James Wood is no long a citizen of Great Britain. That document is presented below.