| Sayler wrote 1, 6, and 7, at least.
    Not sure about the others. | 
      THE BOY SCOUTS OF THE AIR AT EAGLE CAMP -- by Harry Lincoln
        Sayler. Illustrated by Norman P. Hall. 1912. Reilly & Lee; Reilly
        & Britton.
 
THE BOY SCOUTS OF THE AIR AT GREENWOOD SCHOOL -- "A
        group of boys at a boarding school join the Boy Scouts, but a number of
        rivals form a club to thwart their projects." -- illustrated by
        Norman P. Hall. 1912. Reilly & Britton.
 
THE BOY SCOUTS OF THE AIR IN INDIAN LAND -- illustrated by
        Norman P. Hall. 1912. Reilly & Britton; Reilly & Lee.
 
THE BOY SCOUTS OF THE AIR IN NORTHERN WILDS -- illustrated by
        Norman P. Hall. 1912. Reilly & Britton.
 
THE BOY SCOUTS OF THE AIR ON FLATHEAD MOUNTAIN -- illustrated
        by Norman P. Hall. 1913. Copp, Clark.
 
THE BOY SCOUTS OF THE AIR ON THE GREAT LAKES -- by Harry
        Lincoln Sayler. Illustrated by Norman P. Hall. 1914. Reilly & Lee.
 
THE BOY SCOUTS OF THE AIR IN BELGIUM -- by Harry Lincoln
        Sayler. Illustrated by Norman P. Hall. 1915. Reilly & Lee.
 
THE BOY SCOUTS OF THE AIR IN THE LONE STAR PATROL --
        illustrated by Norman P. Hall. 1916. Reilly & Britton.
 
THE BOY SCOUTS OF THE AIR ON LOST ISLAND -- illustrated by
        Norman P. Hall. 1917. Reilly & Lee.
 
THE BOY SCOUTS OF THE AIR ON THE FRENCH FRONT -- "Jerry
        and Tod accompany Mr. Fulton to wartime France to construct his new
        airplane, and they are drawn into adventure and intrigue." --
        illustrated by Charles E. Meister. 1918. Reilly & Britton.
 
THE BOY SCOUTS OF THE AIR WITH PERSHING -- illustrated by
        Joseph W. Wyckoff. 1919. Reilly & Lee.
 
THE BOY SCOUTS OF THE AIR AT DISMAL SWAMP -- illustrated by
        Kirke Bride. 1920. Reilly & Lee.
 
THE BOY SCOUTS OF THE AIR AT CAPE PERIL -- illustrated by Harry
        W. Armstrong. 1921. Reilly & Lee.
 
THE BOY SCOUTS OF THE AIR ON BALDCREST -- illustrated by Harry
        W. Armstrong. 1922. Reilly & Lee. 
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