I thought I had some better info but here is what I do have. John was in Cherokee Co IT in 1900 census. His descendants have much better information.
Caroline Mowery had married a number of men and last info I have is she married a JG or JL Laerd/Laird sometime about 1890. They lived in Fannin Co for a bit before moving to Bryan Co (Bokchito) IT.
I know Jeff Davis Mowery was in Red River Co in 1904 as he sold his interest in his mother's inheritance, but I have not found him after that. It would be pure speculation on my part regarding his whereabouts but your info looks like the best lead I have seen.
If you should find a link please let me know. Thanks.