If you don't know what those old occupations were,....

“ If you don't know what those old occupations were, how they were done, and how they interacted with the passersby, you're not prepared to write a historical novel. A historical figure doesn't pass through a blank countryside. That means you, the novelist, must learn by research what the whole place was like in those times. As much as you can, you must be like someone who has lived there, because you're going to be not just the storyteller but also the tour guide taking your readers through the past. ”

James Alexander Thom

From : The Art and Craft of Writing Historical Fiction: Researching and Writing Historical Fiction