No, that's just the one that I've heard most. 'Merlin's beard!' It's a pretty excellent curse, I think. [ Though it does seem sort of silly to her -- Merlin is here, after all, and she's not sure she's ever seen him with a beard. ]

Sorry, by the way, seriously I wasn't trying to actually knock you off the wall. I was mostly just trying to spook you a little bit for that snowball. I am getting pretty tired of those.