That's kind of anti-climactic: in Old Yharnam I had this er shooting at me with a gatling gun from on top of a tower. I finally got up the tower and the guy just kept kicking my ass. I'd get his health low and he'd reheal and start throwing molotovs at me and . Finally I saw he was standing on the edge of the tower at the beginning of one of my attempts at killing him so I just shot him a few times with the pistol. Knocked the er right off to his death.
This guy and Eileen the Crow were so much harder than the two bosses I have fought. Well, until I killed him with that cheap .