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!
At the Pirate Outpost, the Cannonry is at upper right. Go left to climb up first. The Cannoneer can be hird there. The flag is on the sail to the left of the Cannonry.
You can copy a belted or sheathed sword (not a held one) from several of the characters on Skullduggery Island. One of them is the surly pirate in the Cannonry at the Pirate Outpost.
buy as many grains at the bank place on the lower right corner and go to the cannonry on the left and sell the grain. the grain is worth more on cannonry island ;)
Corsair Cannonry is the location of the skilled Cannoneer, who will improve the speed at which your ship's cannons reload. His salary is 20,000 doubloons. To the right of the Cannonry, on the mast below the Jolly Roger flag, you will find the Cannon Starter Kit (fuses) that fires the cannons at the outpost. (see related question)
The signs will show you the way up to the cannonry, which is left, then up, then right, then up. You do not go up from the flaming brazier.
You go there when you have enough funds to hire the Cannoneer. He lets you fire your ship's cannons faster -- you can shoot again before your shot lands.
Go left and swim to the left side. Climb up there, then cross to the right and climb up to the Cannonry. The items you need (cannon starter kit and small barrel of powder) are on the mainmast to the left, above the Cannonry.
skullduggery island!
Fort Ridley is the first place you go on Skullduggery Island. Its impossible to miss it.
Bouffant Bay is located northeast of Fort Ridley on Skullduggery island Poptropica.com
The bank on Skullduggery Island is the Golden Harbor Bank, located in the Arabic-themed port at the lower right on the island map.
There is a dock at the bottom side of the small island, Skullduggery. The island appears when you have collected all 5 of the pieces of the Treasure Map.