Back when Cedric played the game and decided to venture into this territory for the sake of exploration only to get trapped within the barrier, he had used Leon's All-Seeing Eye to find the way out.
But in order to clear the path, the Eye revealed to him a bit of the history of this place and led him to the Ghost of Rosalind, who dwelled in this manor which was not too far from the bell tower.
After meeting the ghost, he was able to convince her, after which they worked together to suppress the Old One.
However, Cedric now was not Leon and did not have the All-Seeing Eye. Fortunately for him, though, he had the ability to sense Karma. And because ghosts are defined by their unfinished business, traumatic deaths, or unresolved moral debts, they carry an exceptionally high concentration of karmic weight, which makes sensing specters and spirits exceptionally easy for Cedric.
