Mark,
Just a caution. Just because Frank Davis is on the Benton County list doesn't mean that he was with Watie at Pea Ridge. But, knowing the caliber of historian that Seamster was, causes me not to automatically discount his work. I have found several names on that list that I can find no reference to otherwise, whether it be in the CMSR's, Emmet Starr's book, etc., then all of a sudden they show up on a pension appl. somewhere. Your Frank Davis is just another example of that. In any case, I would be glad to send you a copy of the Benton County list if you will email me your address at hughkeen@hotmail.com.
The two witnesses on Davis' pension appl. are interesting. Gailey may or may not be Warren Gailey who served in the 2nd Cher. Regt. as you noted. J. C. Yeargain is James Chambers Yeargain who applied for a pension from Delaware Co., OK in 1922 claiming service with the 2nd Cherokee. I can find no reoord of his service otherwise, but he was approved for a pension.
It is not at all unusual to see pensioners claim Arkansas affiliation with their service in the indian units. They were often recruited and sometimes enrolled in there home counties of Arkansas.
Hugh Keen