Contributing to the road-making impulse immediately after the war of independence was a newly awakened community interest. At the time of the adoption of the constitution there were two distinct classes in the United States: a highly localized class of the seaboard and of the inland trade routes, and a widely distributed agricultural class. American commerce was largely confined to American products. England, France and Holland monopolized the trade of their colonies, and in other ways favored their own merchantmen in foreign trade. Such being the condition, our commercial advantage lay in the development of our own resources. The settlement of the Middle Atlantic states and of the valleys of the interior only served to strengthen the interdependence of the people, who found a common interest in internal improvements. To the agriculturist, cheap conveyance to market was a prerequisite to profitable industry. To the commercial class on the seaboard and on the leading trade routes, inland improvement was at that time no less important. FIRST ERA OF ROAD MAKING. There was a notable change in the popular attitude toward road making after the war, and all public-spirited men now saw in better means of communication an instrument for the establishing of American supremacy over the western continent. Legislatures made generous appropriations for highways. An active migration set in from New York and northern Pennsylvania to the West. In 1738 the first regular mail service was established between Albany and Schenectady. In 1793 the horse path from Albany to the Connecticut valley was widened to a wagon road. Like activity in road making was shown throughout southern and western New York, middle Pennsylvania, Maryland and Virginia. In 1785 Pennsylvania appropriated $10,000 to lay out a road from a point near the mouth of the Juanita to Pittsburgh. In 1786 an act was passed appropriating $1,500 "to view and open a road from Lehigh Water Gap to Wyoming," which was the first road into that valley from the Delaware. In 1787 another road was authorized between the Susquehanna and the Delaware. Activity in opening communication with the interior increased until by 1791 the movement had assumed proportions to be styled a "mania." By a single act over $150,000 was appropriated for the improvement of eleven rivers and over a score of roads in different parts of the state. Other acts were passed at the same session, granting charters and appropriations for various transportation enterprises. New York in 1797 authorized the raising by _lotteries_ of $45,000 for the improvement of various roads throughout the state. As if by common impulse, all the states now became interested in road improvement, and congress was asked to aid by this means the opening up of the resources of the interior. BEGINNING OF THE CANALS AND PIKES.