Once you get your raft, you are best served by going either to Dragon Cove (up and left) or to Parrot Port (across to right). Since you cannot trade much right away, there is more salvage to the left and above Dragon Cove, or between Parrot Port and Golden Harbor. The difference is that there are sea monsters around Dragon Cove, which will eventually attack, and pirates around Parrot Port, who likewise may sink you and cost you doubloons. You have a better chance to escape the monsters, who can provide a real wealth of doubloons once you have a ship that can shoot them (you buy new ships at Dragon Cove).
(see related question)
Fort Ridley is the first place you go on Skullduggery Island. Its impossible to miss it.
It's your choice
First go to skullduggery island,take your ship to a island called Keys World island and you will find the key of the chest on counterfeit island!;)
You have to talk to the police
You go on the island you want to sell on and go to the trading post
Well first of all when you go to skullduggery island there is a map but it was broken up at each island. All you have to do is complete a small task on Fort Ridley (where you began you quest) and then you will have a small/weak boat. You sail North-West from Fort Ridley.
You have to go to see the person,when you first get there the closest person ,beat it already!
You go into any harbor.
Once you have all five pieces of the Treasure Map, the 6th island, Skullduggery, appears on the map. When you acquire a powerful ship, and scare off Captain Crawfish, the Governor will give you the Treasure location and a bone shovel to dig it up. (see related question)
First, you go to the island due west of the main island. Climb up onto the dock, and past the pirate outpost sign. Go past the trading post, and climb the large skull. Go up the chain an voila!
Collect the five map pieces (one on each of the trading islands) and join them to see the sixth island, Skullduggery. Once it appears on the map, you can actually go there, but nothing happens there until the end of the game. (see the related question)
There is nothing to do on the small island, also called Skullduggery Island, until you have defeated Captain Crawfish. Once he is beaten, go back to the governor and get the map to the treasure, and a bone shovel. Return to the small island and follow the directions to find the buried treasure.