First page in the fourth episode can be received from Hartman's patients, in the dining room.
The next sheet lies next to stairs, you'll find it on your way to the keys and an unconscious nurse.
Another page is in the room with Hartman's recordings, you can find this place on your way to his office.
Next sheet is given to you in a cut-scene, in Hartman's office, right after meeting Barry.
Another page lies in the room with a television set. You can visit this place after removing bear statues with a flare.
Next sheet lies in the maze, next to a tree.
Another page can be also found in the maze. After you get to a paved square, turn left to in order to reach a bench with the manuscript page on it.
Next sheet lies in a shed, in front of a light post, which you can see after defeating one Hartman's thugs.
Another page lies on the ground, in the garden, you can collect it after destroying the haunted gate with your flashlight.
Next page is on a stone fence in the garden. Once you reach the table with a shotgun on it, turn left and follow the path in order to find the page.
Once you walk through a small railway bridge, turn left and turn on the lamp placed there. Enter the tunnel enlightened by that lamp. The page is at the end of that tunnel
Another sheet lies on a wooden platform, near the generator with which you turn on the light post in order to destroy the haunted gate.
Next page lies on a rock, near the path you walk right after leaving lumberjack camp. Go towards the bright light in order to find it.
Another sheet can be found next to generator, on the ground, in a forest full of bear traps.
Next page lies on the front porch of the cabin, on a carpet. After jumping through the cabin's windows, walk around the building to find it.
Another page is located on the door of the toilet, at the Anderson's farm. You can find it near the barn and the windmill.
Page available on the highest difficulty level.
Next sheet is placed behind Anderson's stage.
Another page is also at the Anderson's farm. After the fight at the stage, Barry will take you to a barn blocked by a tank. Near that barn, you'll find a harvester, tractor and a wooden carriage. The page is right there.
Next sheet can be found on the upper floor of Anderson's barn, next to the coffin.
The last page is located on the upper floor in Anderson's house.