Once you come across two turrets and metal stairs, go up and follow them around to the left. You will come across a Kinetoscope just before a room full of heads.

Go past the fourth Boy of Silence to the back of the room. On a metal table.

Just behind the fourth Boy of Silence. You should see it on a metal table behind the BoS. Continue around the wall to find Voxophone 72.

Once you come across a projector room which was an observation (see the two cameras and broken one way glass), go though the broken wall and you will see a Kinetoscope on your right

The second projector room you find has a Voxophone next to the projector.

In the room with the second projector and Voxophone 73. In front of the stairs is a desk with a Gear.

In the wardens office, on the chair.

After you use the lever in the Wardens office, there is now another Voxophone in the elevator.

After you rescue Elizabeth, unlock the door which needs 3 lock picks and go up the stairs. Find collectibles.

After you rescue Elizabeth, pick the lock on the door opposite to where you need to go. Up the stairs will be an upgrade and Voxophone.

After the fight, unlock the big building and go in. In the left room is a Voxophone.

Just before you board the ship to the next zone, look to the left to see a Telescope.

After using the Sky Rail to progress up the levels, find and unlock the engineering department (the controls end of the ship).

Second level of the airship. After Voxophone 78, there is another room past engineering. At the front of the ship, marked Secure Area. Pick the lock. Gear inside.

After you meet with Comstock, go up to the catwalks but do not control the ship yet. Find his office and bedroom. Each room has a recording.

After you meet with Comstock, go up to the catwalks but do not control the ship yet. Find his office and bedroom. Each room has a recording.