It seems that the magistrate's brother is trying to prevent him from getting any credit for retrieving that family heirloom. There is actually a ship on the way carrying a title and a commendation for the magistrate, but his brother has withdrawn its escort, and it's sailing through pirate-infested waters. You need to guide it into port by igniting some lighthouses.
- Protect the Capital Ship
- Find and Light the First Lighthouse
- Find and Light the Second Lighthouse
- Find and Light the Third Lighthouse
- The Capital Ship Must Escape
- Salute the Magistrate
- Deliver the Commendation
- optional: Defeat the Magistrate's Brother
This is flagged as a group mission, but it is quite doable solo.
An escort mission. There will be four lighthouses, with the mission's exit point in front of the "final" one. At all lighthouses a "sleeping" ship is located. That means you can sail up to it and just board it (ships show "crew sleeping" debuff). Two extra ships are sailing around and are hostile from the beginning.
Your escortee will hold position unless you light a lighthouse and click it again to signal him to come to that position.
Basically, best strategy is to board the "sleepers" and then close-combat the two remaining ships one by one. Signal your capital ship if the area around a lighthouse is safe.
Once you have done that, you can return for your reward. This part will take place in a separate mission instance. The magistrate's brother will also be present, and you'll have to talk to both of them. When presenting the commendation to the magistrate, you will have to salute him first (type /salute).
At one point, his brother will insult you, after which you'll have a choice: you can take offense and duel him, or you can refuse to be provoked. If you choose the first option, you will then have to fight his brother in a swashbuckling duel (a level 10 Boss). Although the magistrate won't be very happy if you kill his brother. If you choose the second option (stay calm), the magistrate will thank you for your restraint and this will also be rewarded with a 100 experience bonus.