There was a George H Lanning who was a clerk for Nathaniel Lyons in Missouri. Which one was it or was it yet another Lanning! Three of them running around seems to be a bit more than coincidence, but then stranger things have happened.
Booth's widow produced the letter regarding the family feud to prove Lionel Booth and George Lanning were the same person in order to get her pension. There was some argument about it but the government accepted that Major Lionel F Booth and Major George H Lanning were the same person after all. (Who was in Missouri is uncertain, however!)
Told you Major Booth was a fun study!