"In 1864, Archduke Maximilian of Austria was sent to serve as emperor of Mexico. Some Cahill insiders believed that it was actually the Janus who sent Maximilian overseas, and that they gave him a secret item to take with him. The scheme didn't go exactly according to plan, though. In 1867, Maximilian was captured by Mexican Republicans who objected to having a foreign ruler. He was executed, and Benito Juarez, a suspected Tomas agent, became president. According to Cahill legend, Juarez had Maximilian's possessions seized and transported to the National Palace. Was he simply in the market for some new furnishings, or was Juarez looking for something infinitely more rewarding?"
Question: What is the secret message hidden in the crown?