THE UNIQUE STATUS: Mary St. John-The Private Secretary John Wayne Called "The Most Interesting Man." Family Position: Mary St. John was more than just a private secretary; she was considered an indispensable member of the John Wayne family. She managed not only his work and complex finances but also The Duke's most private personal matters. The clearest evidence of this absolute trust is Wayne's famous jest: "When someone calls me about a private matter, I usually joke: 'Tell Mary St. John, she’