How do you open the Jewelry Box?

Hint 1 of 9:

It seems you have found another item that requires a key.

Hint 2 of 9:

If the initials A.M. do not mean anything to you, yet, then you
are not ready to solve this puzzle.

Hint 3 of 9:

Have you been on the roof?

Hint 4 of 9:

Did you notice the small balcony from the roof?

Hint 5 of 9:

The balcony is off of Alison's writing room.

Hint 6 of 9:

Violence is SELDOM the answer.

Hint 7 of 9:

It is the answer here.

Hint 8 of 9:

Break with window.

Hint 9 of 9:

Did you notice the sill?