5. Information gaps.

As for my book, the author indicated the information gaps. Nelly told Mr Lockwood  the story that had begun in 1778, that was nearly twenty-three years ago from the moment of speaking.
Notwithstanding, we could guess about the century because of some facts. First of all, families were big and they lived in mansions, also, the superiority of people played a big role. There was a housekeeper and clergyman in the house. Moreover, it was said that some commentary were pen-and-ink. What is more, there were many dogs in the house, I suppose that it's tendency related to that time. One can not ignore that Heathcliff spent a lot of time in the barn with horses, so there were not cars and everyone rode horses only.