Warning, spoilers ahead.

I'm late getting through the story but Leviathan has finally been summoned. Everyone's back at the Admiral's office and strategizing how to defeat him when Eynzahr Slafyrsyn comes up with a plan based on something Mistbeard apparently once did. This results in Merlwyb commenting "Mistbeard did this? Truly, Marshal, upon the subject of the pirate king, you are as a scholar." Slafyrsyn looks particularly awkward at that comment, and then hurries to change the direction of the conversation back to the matter at hand.

Their exchange and expressions seem over the top for such a casual statement, as if there's some deeper meaning that Slafyrsyn doesn't want to admit.

Is he Mistbeard or did he work for Mystbeard? Is there some other reason he may be particularly close to the famed pirate?

I know there are some people who are great at picking apart all the tiniest references throughout the game and identifying tidbits that most of the rest of us never get. Please, if you can share your knowledge, it would be very appreciated. That CS has made me so curious now ^_^