I have learned that Carolyn Foreman was a better historian than her husband, Grant. He tended to footnote, "Old Army Files", which, before the establishment of th National Archives, was acceptable. Now, with records groups dividing government departments and entities into their components, that usage by Foreman is no longer acceptable. What I mean is, that he could have stated, "Adjutant General's Office, Quartermaster General", etc. I also find that he passed on myths, some easily disproven; such as, Lee served at Fort Gibson. Foreman had the AG of the U.S. Army provide lists of officers who served at the post. While Foreman passed on this myth of Lee and others of the 2nd Cavalry, he had the evidence before him. I guess that it is caveat emptor, when dealing with some of the early writings on Oklahoma military history.