It was very pretty traveling thus, at a rapid pace along the heights of the mountain in a keen wind, to look down into a valley full of light and softness; catching glimpses, through the tree-tops, of scattered cabins; children running to the doors; dogs bursting out to bark, whom we could see without hearing; terrified pigs scampering homewards; families sitting out in their rude gardens; cows gazing upward with a stupid indifference; men in their shirt-sleeves looking on at their unfinished houses, planning out tomorrow's work; and we riding onward, high above them, like a whirl-wind. It was amusing, too, when we had dined, and rattled down a steep pass, having no other motive power than the weight of the carriages themselves, to see the engine released, long after us, come buzzing down alone, like a great insect, its back of green and gold so shining in the sun, that if it had spread a pair of wings and soared away, no one would have had occasion, as I fancied, for the least surprise. But it stopped short of us in a very business-like manner when we reached the canal; and, before we left the wharf, went panting up this hill again, with the passengers who had waited our arrival for the means of traversing the road by which we had come. ¹ ¹ Op. cit. This Pennsylvania route was likewise famous because it included the first tunnel in America; but with the advance of years, tunnel, planes, and canal were supplanted by what was to become in time the Pennsylvania Railroad, the pride of the State and one of the great highways of the nation. In the year before Pennsylvania investigated her western water route, a joint bill was introduced into the legislatures of the Potomac Valley States, proposing a Potomac Canal Company which should construct a Chesapeake and Ohio canal at the expense of Maryland, Virginia, and the District of Columbia. The plan was of vital moment to Alexandria and Georgetown on the Potomac, but unless a lateral canal could be built to Baltimore, that city--which paid a third of Maryland's taxes--would be called on to supply a great sum to benefit only her chief rivals. The bitter struggle which now developed is one of the most significant in commercial history because of its sequel.