What about 2:00

Hint 1 of 9:

 Read the note posted on the front door.

Hint 2 of 9:

+Discover Lillian's body in the nymph garden.

Hint 3 of 9:

 Get the gun and bullet from the ground near Lillian's body.

Hint 4 of 9:

 Search Lillian for a skeleton key.

Hint 5 of 9:

 Look at her boots, and look at the insignia with the monocle.

Hint 6 of 9:

 Be sure to load the gun with the bullet bullet.

Hint 7 of 9:

 Find the doctor's bag in Henri's room.

Hint 8 of 9:

 Then go up to the attic door, and unlock and open it.