It's a Secret Map! It's by Lieut.-Gen. Sir Robert Baden-Powell, K.C.B., one of the founders of the Boy Scouts and the author of the original Scouting for Boys. Baden Powell was also an artist/illustrator who did the illustrations for Scouting for Boys. In his book, My Adventures as a Spy, Baden Powell recounts how, as a spy during the Boer War, he would pose as a butterfly collector or an artist and draw depictions of military positions, and fortification details. Spies and Butterflies.