The name "Northern Virginia" does not seem to have been used in the early history of the area. According to Johnston, some early documents and land grants refer to the "Northern Neck of Virginia" (see Northern Neck Proprietary), and they describe an area which began on the east at the western shore of the Chesapeake Bay and includes a territory that extended west, including all the land between the Potomac and Rappahannock rivers, with a western boundary called the Fairfax line. The Fairfax line, surveyed in 1746, ran from the first spring of the Potomac (still marked today by the Fairfax Stone) to the first spring of the Rappahannock, at the head of the Conway River. The Northern Neck was composed of , and was larger in area than five of the modern U.S. states.