If you look at the map closely you will find there is a peculiar little jog in the boundary line of Jefferson County where it follows Port Discovery Bay. In By Juan de Fuca Straits, James McCurdy gives us an explanation for this phenomena.

It seems that when time came to draw the boundaries of the new county there were only 189 persons living in Jefferson. But in the district was a family with a very sinister reputation. They were suspected of everything in the book including murder. The people of Jefferson said very emphatically, "We don't want that family of killers in our county -- let Clallam have them."

So the obliging map makers drew a jog in the line around the property of the undesirables, and Clallam got them.