When Part 3 (On the Road) begins, Claire rides alongside Ned Gowan, a lawyer who joined clan Mackenzie because he thirsts for adventure.
He's also kind of a gossip, telling Claire some of Jamie's family history.
At night, they stop at a pub. Dougal makes a dramatic speech and then tears Jamie's shirt off, exposing the scars on his back.
This rouses the patrons to throw their money on the table, and Claire realizes that Dougal is a Jacobite: "supporter of the Young Pretender [Bonnie Prince Charlie] against the lawful occupant of the throne of England, George II" (11.65).
In other words: He's kind of a bad guy.
Claire confronts Dougal for exposing Jamie against his will, but Dougal is less than sympathetic.
She later overhears Dougal and Jamie arguing—Jamie is furious that Dougal is going behind Colum's back and collecting money for Jacobite causes.
Their travels continue unchanged—inn, speech, stripping Jamie, collecting money—until one night a patron at the pub mouths off and Jamie beats him up.
Jamie takes a few blows in the barroom brawl, so Claire stitches him up yet again.
While repairing Jamie's body, Claire learns that Jamie has planned a secret rendezvous with a man named Horrocks, a man who knows who really shot the man Jamie was arrested for. Perhaps he can clear his name.