In Molida Island, find Romano's dad's hideaway. In the first hidaway( there are two), I
think you find a journal and a treasure box. ( You might find a shovel, or that could be
earlier in the game.....)Then you go back up, and dig in front of one of the palm trees.
Fall down the hole, wander around, and you should find another journal, and ( woohoo!) the
map explaining the exact directions about how to get through the fog.( This might be
obvious, but jot down the instructions on how to get there on your sea chart.)