But the Baron wasn't at the camp, was he?

[ well, who really knows? he's going of best guesses right now, and trying not to count out any loose ends. ]

We should be checking both. If the Baron was involved, we'll want to look for something linking him to the mage - communications, money exchanged, anything suspicious the servants might've seen or heard.

Did you and the others already look over the camp where they were taken?