There's not much out there about Margaret Burnham as a writer. It appears that the piece "The Girl Aviators' Motor Butterfly" that has been attributed to her may be fictitious. The book might have been published under a pen name or as a part of a series released by a publishing house or syndicate like the Stratemeyer Syndicate, which published a number of children's books under several pen names. The novel "The Girl Aviators' Motor Butterfly" is probably classified as children's literature because it primarily deals with themes of friendship, aviation, and adventure. It might chronicle the adventures of young pilots pursuing their aspirations of flight while navigating difficulties and overcoming roadblocks. It's challenging to give a thorough account of Margaret Burnham's life and literary career in the absence of more details. Nevertheless, whether authentic or not, her work probably enhanced the diversity of children's books and encouraged young readers to go into the realm of adventure and flight.