It seems that every book -- at least the mystery, action thriller, and horror books -- set in Victorian England absolutely must include Jack the Ripper. (Yes, there are a couple of exceptions, but it's a pretty strong trend.)
One unfortunate result is that Victorian historical fiction is almost always set in the last decade or two of the century, when in fact Her Majesty's reign stretched back for twice that long before. What with the industrial revolution on the rise, and trains, the telegraph, and artificial lighting being brand new, the mid 19th century was a happenin' time.
C'mon, authors, there were people in England between Jane Austen and 1888. Some of them must have interesting stories.