Changed my Novel Title from “Visitations” to “The Witch and the Hound”

Since the novel is about a Witch and a supernatural Hound that want to catch a serial killer, I decided to change the title of the book. It is a more interesting title.
I am also moving the timeline from the present day towards the past, I haven’t decided yet where to put the time and place.
I have three possible scenarios:
1. London, around 1864, Brittania is at the height of its power.
2. New York, circa 1898, at a time where the city (and its criminal elements) were growing by leaps and bound.
3. London, around the 1920s, with criminals, spies and crime ridden neighborhoods.

Maybe you can tell me which scenario sounds more interesting.