An unused supplement to the 1922 Detroit Program. Folded size is 6.5x10". Unfolded left cover has Map of Courses. Interior pages all list pilots, aircraft type,race number, motor, H.P., spark plugs, ignition, and carburetor; blank spaces follow for entering order at the end of each lap. Each race has a separate page: Curtiss Marine Flying Trophy (Sat, Oct 7); Detroit News Aerial Mail Trophy (Thur, Oct 12); Aviation Country Club of Detroit Trophy (Thur, Oct 12); Liberty Engine Builders' Trophy (Fri, Oct 13) and the Pulitzer Trophy (Sat Oct 14 on two pages with 25 entrants). Important addition for the 1922 program in your collection. As new condition.