The suit is rather more flashy than he would normally choose to wear but it does fit and he can't find his stick, so he tries not to limp too much. He won't show weakness in front of his man,

"Holmes, everyone knows Holmes. Where is Mrs. Hudson?"

Getting out of this room will make things make more sense and he can feel that he has a fever, that's rather worrying. Holmes must have been brewing something up that didn't work.