Dr. Arkham's Observation Journal (Investigations)

Locations
Dr. Arkham's Observation Journal: Observations on Harvey Dent - behind the Reception Counter at the entrance

Dr. Arkham's Observation Journal: Observations on Edward Nigma - by the desk in the experimental procedure room

Dr. Arkham's Observation Journal: Observations on jervis Tetch - In the room after the Therapy Fulfilment Center

Dr. Arkham's Observation Journal: Observations on Dr. johnathan Crane - Amadeus memorial Theater

Dr. Arkham's Observation Journal: Observations on Dr. Harleen Quinzel - Arkham Cell Block 6 behind a boiler (There are signs on the pillars)

Dr. Arkham's Observation Journal: Observations on Victor Fries - The Boiler Room where Mister Freeze is

Dr. Arkham's Observation Journal: Observations on Pamela Isley - Sothwest corner of the courtyard of seerenity

Dr. Arkham's Observation Journal: Observations on The Joker - Hall of Records North End above the the wall in between lockers