Ok, I'm in Mournhold with my Argorian Ninja and I'm in the sewers of the place but I cant find the Dark Brotherhood who sent the assasin to kill me. I want to make sure these little fags dont try anymore funy buisness so where do I go in the sewers to kill them?

Old Mournhold, Manor District. You can reach it from the Temple sewers (I think). Try searching for "Dark Brotherhood".

Try looking for their base in the Bazaar Sewers.

CLB1110, please check the date of a post before replying. If Captain Shibby is still looking for the Dark Brotherhood since MAY 04 I'll eat my hat! Check out the rules in relation to thread necromancy, thanks!