I'm at my first mystery in London, and i'm not even sure how they work. I have one of each of the required components, but I'm really not clear on if I'm supposed to get a specific influence to a certain level or combine a set of them. I'm all for experimentation and figuring things out yourself, but I'm just not sure where to start.

I also figure this discussion might be useful for anyone else puzzled by a specific new mechanic to ask about here.