The Treasure in the Royal Tower part 10

Here's the video walkthrough:

And this is my written walkthrough! Tips: (Italics means it is optional) (Bold means it is necessary, but not necessarily right now) (Underlined mean a new location)

Lobby

Talk to Professor Hotchkiss.

Hotchkiss' Room

On the typewriter desk, read the translation in Marie's journal.

On the upper left corner of the desk, pick up the decoder: Loyalty, Honor and Courage. Those are the        words that were in bold in Marie's journal!

Royal Tower

Zoom into the purple rose of Marie Antoinette's portrait.

Use the spade from the knight we picked up a while back to carve it out.

Grab the thing you find inside. I'll call it the square key.

Zoom into the thing on the floor. We'll call it a chest.

Put the red medallion into the upper left circle.

Put the blue medallion into the upper right circle.

Put the green medallion into the bottom circle.

Put the square key in the square in the middle.

Ask the culprit whatever questions you want.

Press the button we found to the left of the stairs to the Royal Tower.

Listen to the ending letter! Congratulations! You won the game!If you have ANY questions, comment on my post. I will respond ASAP and put it in my walkthrough for others. Thank you!