Betty, I live near the AZ State Library and know they have an extensive collection of books for researching genealogy. Their on line catalog is at: http://dlaprcat.lib.az.us/uhtbin/Webcat I just checked it out and they listed 12 books on their shelves, using keyword: Pancho Villa. There is one that may be of interest to you tittled "Chasing Villa; the story behind the story of Pershing's expidition into Mexico", by Col. Frank Tompins. 1868- General note:"Commisioned personel of the U.S. Army who served with the Punitive expidition" p. 257-270 You may be able to arrange an interlibrary loan with this library. Check it out. Happy Hunting. Bob Blakeslee, Phoenix AZ