I've found another of those damn things like the ones which are blocking the Weir Gate - and a little Daedra went straight by it! I think he's got some sort of special charm or something that lets him through. I sure can't get past.
Oh, and here's another hint for you - there's a big gem thing just near here - heals you right up! Boy, was I glad to find it!
Vatasha/Josian