Carson is working to help Captain Easterly get a clear title to the ship he's renting, the Bonny Scot. Nancy travels to Boston to help him out, because some assholes are breaking into the ship, busting shit up, and then flitting off like ghosts. So, dicks, in other words.
Nancy accompanies Ned to a dance at Emerson and they go on a moonlight stroll! And they are so super cute together. I love y'all. (Ned also takes a punch when Nancy sends him into a restaurant to trail a suspect. Poor Ned.)
Related: Bess is home alone, freaks out, and calls Nancy early in the book, and then she HEARS A NOISE UPSTAIRS and SCREAMS and then SOMEONE HANGS UP THE PHONE. Nancy goes over there and finds poor Bess stuffed in a closet and someone has stolen her parents' stuff! Mostly jewelry. Nancy finds that the asshole who did it apparently took off his own ring to try on Bess's dad's diamond ring, and so he left his ring behind.
The robber, of course, is also busting in on the ship. He met a guy who told him about some secret passages/portholes/etc.
Nancy finds:
-a snuff box with a picture of what might be the boat on it! And a guy snatches it right out of her damn hands. It's pretty ridic.
-a box of gold coins! And the evil robber finds her IMMEDIATELY, like he has fuckin' gold radar, and just takes it. Asshole.
-a big ol' ruby in the lost figurehead! Nancy passes that along to the rightful inheritor. The captain of the ship was lost in a pirate attack, and he was bringing the ruby back to the girl he loved, but once he was lost, she mourned him and then moved on. Nancy gives the ruby to the granddaughter.
Nancy's souvenirs:
-a drawing of the ship, which was originally called Dream of Melissa, as it originally looked
-the snuff box!
-a Neptune figurehead Nancy randomly found in the water, as you do. I come across figureheads all the time.