1, 2, 4
The archway is right to the right of the trading post in the golden harbor. You need to turn the lights on and off according to the combination.
4,2,1
On main street right by your blimp.
It is on the hill to the right of the farm.
it the island on the upper right corner
His house is to the far right at Fort Ridley.
Look at the arch in the middle.
The bank on Skullduggery Island is the Golden Harbor Bank, located in the Arabic-themed port at the lower right on the island map.
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If you look at the island in the middle it is to the right of it
He is in the cannon shack at the top right hand corner of Pirate Outpost.
The trader is right at the end of the dock.