Letters to the Sphinx contains five main sections: the first is a typically characterful, cantankerous and yet appreciative essay of explanation by Oscar Wilde's literary executor and close friend, Robert Ross. Then follow three major essays of reminiscence by the Sphinx herself, the book's compiler, Ada Leverson, also a dear friend of Wilde: The Importance of Being Oscar gives an iconically witty introduction to how Wilde operated and who he was;...