"Yes, sure!" the halfling says to Klaus, "it's over here." He gets to his feet, one hand pressed to his injured side, and goes over to one of the walls. He hits a hidden catch, causing another concealed door to open. Beyond is a set of stairs leading down. "They get dwarfs in to do this work," he says, "dwarfs know stone. Anyway, you go down the stairs here, and open another door into the sewers. Look, I'll show you."
The stairs end in what looks like a blank wall, but a door opens when the halfling hits another catch. On the other side is a sewer passage, with a walkway running alongside the effluent channel.
"If you want to go to The Man's base, you go left from here, then first right, then second left, then first right. Ten yards down that passage you'll see a carving in the wall - like a lion or something. About a yard to the right of its tail, going straight from it, there's a catch that opens the door. It's not easy to spot, but it's there. Then you'll run into the guards. But I'd say you can handle them no bother!"
Heinrich fetches the rest of the group from outside the brewery and takes them into the laboratory. Julian, who is trained in chemistry, recognizes that the equipment here is most likely used to manufacture drugs and poisons of various types.
The Knight Eternal sneers with disgust as he looks around the lab. "What filthy things were made here? No doubt this room is used for criminal purposes, or it would not be so concealed. You, halfling: you are under arrest. You will be bound and delivered to the watch later. If you are lucky, you will get away with a few dozen lashes only."
"What? Hey, that wasn't the deal! I did what you asked!"