(History of Aviation : Ephemera) 1 Portfolio. Relating to Howard Hughes, etc. "Hughes Aircraft Company Engineering Illustrations. Model D2." - cover title. No place. 1943. 4to loose-leaf binder; worn and blistered. Preface + 14 sets of photos and plans - mostly on laminated paper. Some internal creasing and dampstaining. Hughes Aircraft Company red stamp on inside front cover, with the ink inscription, "T. E. Gaughan [on behalf of] Howard Hughes - Roy Whendel, Proj(ect) Eng(ieneer) - 1943." Preface reads: "This book contains photographs of illustrations on Model D-2 and D-2A Airplane...These perspective drawings have been prepared primarily for army handbook presentation...."