WW I flying ace; an active champion for a strong independent air force, he was court-martialed for insubordination and suspended from duty for five years in 1925. Vintage fountain pen signature, “Wm. Mitchell,” on a white 4.5 x 2.5 sheet. In fine condition, with scattered faint toning, mounting remnants to the corners, two typed biographical notes affixed to top and bottom borders. R&R COA.
