This is the original jail in Salinas built in 1878. It housed six prisoners!
I've been researching a family named Whitcher for a historical novel. Just the other day I located this jail in which the patriarch of the family, Thomas, spent six months! Not only that, but his son, who attempted to shoot him, would have been housed here too. One side is about 10 by 10 feet. The other is about 10 by 5 feet. The only separation between the cells is a piece of wood! 
In our modern world it is unimaginable, even inhumane, to imagine holding people in such a place for an extended period of time. 
If you look super close, you will see a horseshoe over the left cell pointed down. The normal way to put up horse shoes for luck is to put the shoe facing up, like the letter "U." This is to keep the luck in, but in this case, with the horse shoe upside down, it must mean that the person's luck had run out!