To me, Madame Girard (the woman who runs the museum in Rennes-le-Chatueau) looks and sounds a lot like Madame Cazanoux (the old lady from the first game). And there are a couple of other interesting things: they both call themselves a "Good catholic woman" and when Gabriel asks Madame Girard if she is from France, she replies "Well, France thinks so," which suggest that she may really be from New Orleans. Are Madame Girard and Madame Cazanoux the same person?

Not the same character, but they are played by the same actress (Susan Silo)