Once you defeat Meowiarty(or Roriarty from Sherlock Holmes), you should talk to Sherlock Bones. He will tell you talk to Private Kinchely or Merle Ambrose I forget which. They will send you to MS. For further checking, see if you have these badges:
SS:beat Katz, Ct. east and west, and probably flipped on a monster in the middle of Big Ben CC:got to the floor BEFORE Meowiarty, and beat da CRUSHER! M:Beat Meowiarty, either logged out in there or got lost in a wasteland of quests HE:You did talk to Sherlock; look at the top of this response
Did it alone? Failed or successful? If successful then go to clancy the curator in the royal museum. Then you have to go to Merle Ambrose. Then he will give you the key to Mooshu. And one more thing:Good job doing that alone! Lucas Drakebloom Ice wizard Level 35 Oni slayer
