The navigation of the Potomac was not easily secured and the Potomac Company relinquished its charter in 1823 when the Chesapeake and Ohio Canal Company was formed. Yet in only one generation after Washington's death the important features of his great plan of internal communications were realized. The Chesapeake and Ohio, Erie and Ohio canals made the exact connections desired by Washington half a century before, and with the very results he prophesied. To crown all, within two years of Washington's death, the great highway across the mountains for which he had pleaded for many years was assured, and for the next half-century the first National Road in the United States fulfilled to the letter Washington's fondest dream of welding more firmly "the chain of federal union." True to his declared conviction, that "the western inhabitants would do their part," the creation of the first state beyond the Ohio, was responsible for the building of this great road; and, also, true to Washington's conviction, the commissioners appointed by President Jefferson to determine the best course for the road, decided in favor of Washington's old roadway from Fort Cumberland through Great Meadows to the Monongahela and the Ohio, the course Washington always held to be the one practical route to the West and which he had had surveyed at his own expense. For three score years Washington's and Braddock's roads answered all the imperative needs of modern travel, though the journey over it, at most seasons, was a rough experience. During the winter the road was practically impassable. Colonel Brodhead, commanding at Fort Pitt during the Revolutionary War, wrote Richard Peters: "The great Depth of Snow upon the Alleghany and Laurel Hills have prevented our getting every kind of Stores, nor do I expect to get any now until the latter End of April." But with the growing importance of Pittsburg, the subject of roads received more and more attention. As early as 1769, a warrant was issued for the survey of the Manor of Pittsburg, which embraced 5,766 acres. In this warrant an allowance of six per cent was made for roads.[19] Six years later, or the first year of the Revolutionary War, court met at Pittsburg, and viewers were appointed to report on a large number of roads, in the construction of which all males between the ages of sixteen and forty-five, living within three miles of the road, were required to work under the supervision of the commissioners. One of these roads became, nearly half a century later, incorporated in the Cumberland Road. The licensing of taverns by Youghiogheny county in 1778, and of ferries about the same time, indicate the opening and use of roads. Within ten years, the post from New York to Pittsburg was established over the treacherous mountain road. In 1794, the Pittsburg post-office was established, with mails from Philadelphia once in two weeks.[20]