A video guide for "Nancy Drew: Treasure in the Royal Tower". In this section, I call Bess and George. I then talk to Professor Hotchkiss about Marie Antoinette's journal. Using Marie Antoinette's decoder that Hotchkiss translated (and using the symbols found in peep hole by looking through it with all the medallions), I get the hidden message that "purple rose hold diamond key of queen". This, of course, means I have to go back to the royal tower and look behind the tiles holding the purple rose, where the key that unlocks the diamond is hidden.
This video contains footage from the Nancy Drew series, made by Her Interactive (www.herinteractive.com). All rights are owned by Her Interactive.