The Yorkshire “Yorkie” Terrier breed is known to be developed in the 1800s, but its origins are not entirely certain, this may be due to the working people of north England, who developed the Yorkshire Terrier for catching rats that infiltrated their mine shafts.
Yorkies were also seen known as hunting dogs that could dig deeper into badger and fox burrows. It seems likely that Scotsmen seeking work in the woolen mills of Yorkshire brought these various types of terriers with them.
At first, Yorkies were a much bigger animal than the one we see today. By selectively breeding the smallest individuals, the dog was gradually miniaturized over the years. The Yorkie was then made into a fashion dog. Women carried these little dogs in their bags and under their arms.
To learn more about Yorkies and their history visit this: Yorkshire Terrier Wiki.