Izabelas Letter:
When you go down the stairs to reach the bottom floor, stop halfway down and look through the cracks. Aim through and you will be able to shoot open a small door. Go around and you will find a crawl space where the letter is hiding along with some ammo.

Health 1:
When you reach the office to open the doors to escape the asylum, before doing so, pop open the safe behind you if you have Fergus hacking ability and receive the statue from inside.

Gold Hood Ornament:
In front of the car when you get outside.