The Crocker journal is a family record kept by the Crocker family containing the Crocker family history going back centuries.
Duke discovers the journal in the Crocker Box that he found on the Cape Rouge. In there Duke finds a picture of Sarah with a note from his father telling him to kill her.
In Nowhere Man, Duke looks through the journal to look up the trouble that split Mara and Audrey in two.
In Exposure, Mara asks Duke to bring her the journal.
