British historian, journalist, and engineer credited with the development of the tank during World War I. ALS signed “E. D. Swinton,” three pages on two adjoining sheets, 4.5 x 7, June 26, 1925. Letter to Britten-Austin arranging an appointment for him with the Air Vice-Marshall. In part, “Thanks for your congratulations. It is a good job…I’m glad that the Civil Aviation did something for you…Write to Air Vice Marshall…If you have all the questions you ask ready he will be very pleased to give you 1/2 and hour and answer what he can.” Rusty punch holes to both pages, a couple slightly affecting a couple words of text, and some stray pencil marks to first page, otherwise fine condition. RRAuction COA.