How can I find the killer?


Hint 1 of 7:
You're going to have to make the piece yourself out of marble.

Hint 2 of 7:
The marble is in the wagon (or at least the picture of a wagon) in the book
room.

Hint 3 of 7:
The wagon will need to be repaired first and it needs something to pull it.

Hint 4 of 7:
Use the paint brush with ink (see another question to find out how to get
ink) on the picture to paint in an ox.

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