find all of the ripped paper pieces and it will tell you
You use it to open the secret passageway all the way to the right of the factory.
This is highly debatable and open to hundreds of interpretations. It could be a sign that your secret hideout/passageway is going to be discovered or that you need to make a secret hideout/passageway.
Open is the secret code you can find it on google!
its OPEN
u have to wait until it opens which is 10.00 pm
the code is open and you can get the symbols on top of the entrance of the cave
to open the door click a paper near nonfiction
Push on the shelf marked "Non-Fiction McM" on the lower aisle of the library. This is written on the library slip found at the Mordred Museum, which you need to open the passageway. Get the shiny gold coin from the fountain and pay your admission, and find the library slip in the stack of books.
You come up into the supply room of the Museum Fantastique.
The key doesn't open the secret compartment! You click on the different panels on Mark Twain's wall to find the compartment. The key is for luggage.
You use the decoder the girl gave you and match up the symbols
you have to go to the girl beside the cave and try to get the page on the top of the cave.