THE NEW COUNTY ROAD, between Edgartown and Holmes Hole, is in a good state of forwardness; that portion lying within the Tisbury boundary, we believe, is entirely completed. We passed over the road a day or two since, and are free to confess that we consider this the greatest improvement to locomotion ever made on the island. Through a considerable portion of the route, the road is already as hard and as handsomely finished as any turnpike we ever passed over.