Map found hidden in bedpost in N'bod's room
The chest in N’bod’s room opened with a green glow, which lead to another place. The adventurers went into the green glow and found themselves on a white beach with clear blue waters. There, they met Cayman who confirmed, this map was their location. The spot of Cayman’s hut is just to the right of the diagram of The Lurker in the Shallows.