He also wrote Wings Over the Somme 1916 -- 1918 , his memoir of his war experiences .
During 1919 and 1920 , despite his resignation from flying , Lewis began writing about aviation safety while he began his career as an insurance broker .
Lewis also wrote Wings Over the Somme 1916 -- 1918 , Lewis ' memoir of his war experiences .
During 1919 and 1920 , despite his resignation from flying , Lewis began writing about aviation safety while he began his career as an insurance broker .