As against these advantages, however, there was the disadvantage that, the further inland the river-port, the greater was the risk that access to it might become impracticable either through the formation of shallows in the river-bed or because the larger build of vessels in later years could not pass where the smaller and more primitive type of ship of earlier days had gone without difficulty.
From one or other of these causes many English rivers on which considerable traffic formerly passed have dwindled in importance, even if they have not ceased to be navigable at all; and many inland places that once flourished as river, or even as "sea"-ports, would to-day hardly be regarded in that light at all, as shown, for example, by the fate of Lewes on the Sussex Ouse, Deeping on the Welland, Cambridge on the Cam, Ely on the Ouse, West Dean on the Cuckmere, and Bawtry on the Idle. York and Doncaster, though situated so far inland, once considered themselves seaports because of their river connection with the coast, so that, as told by the Rev. W. Denton, in "England in the Fifteenth Century," they claimed and exercised the right of sharing in "wrecks at sea" as though they stood on the seaboard instead of high up the course of the Ouse or the Don.
The Romans not only supplemented their road transport by river transport but they sought to improve the latter by the construction of river embankments. In the case of the Trent and the Witham they even cut a canal—the Fossdyke—in order to establish direct communication between them. Just, however, as road-making became a lost art here on their departure from Britain, so did an interval of a thousand years elapse before there was any material attempt to follow their example in effecting improvements in river navigation. The initial advantage, therefore, lay with towns located on rivers which were naturally navigable and remained navigable both for a considerable extent and for a considerable period, without need of amendment; though river navigation, as a whole, did not attain to its highest development until, as will be shown in the chapter that follows, much had been done, especially in connection with streams not naturally navigable, to overcome the various impediments or difficulties to effective transport.
All the same, the part that English navigable rivers, great or small, have played in the social and economic progress of the country has been one of undeniable magnitude and importance, and offers many points of general interest.
These considerations more especially apply to the river Severn, which, in conjunction with such of its tributaries as the Wye and the Warwickshire Avon, was once the great highway for the trade and traffic, not only of the western counties, but of, also, a considerable area in Wales and the midland and northern counties, enabling the districts it more directly served to attain an early development long before others which were then still struggling with the disadvantages of bad roads, however much they may since have outstripped them in the race for industrial advancement.
The Severn itself was naturally navigable from Welshpool, Montgomeryshire, a distance of 155 miles by a very winding stream to where the river empties itself into the Bristol Channel. This was the greatest length of navigation, unaided by artificial means, of any river in the kingdom. The early Britons passed along it in their coracles, and, as these were supplemented by vessels of an improved type, trade was developed, towns and cities—each a storehouse or an entrepôt for a more or less considerable area—began to arise on the banks, while Bristol attained to the dignity of a great national port when Liverpool was still only an insignificant fishing village.
It was in connection with the Severn that the question arose as to the right of the community to regard a navigable river as a public highway, the same as if it were a road dedicated to general use.
The writer of the article on "Rivers" in the "Penny Cyclopædia" (1841) observes that: "In rivers which are navigable, and in which the public have a common right to passage, the King is said to have 'an interest in jurisdiction,' whether the rivers were the King's property or private property. These rivers were called 'fluvii regales,' 'haut streames le roy,' or 'royal streams,' because of their being dedicated to public use, all things of public safety and convenience being under his care and protection." Navigable rivers being thus, the writer continues, the King's highway by water, many of the incidents belonging to a highway on land attached to such rivers, and any nuisances or obstruction upon them, even though occurring on the private land of any person, might be made the subject of indictment.
In regard to the Severn and the right of access thereto, it was found necessary, in 1430-1, following on complaints which had been made to Parliament, to pass an Act (9 Hen. VI., c. 5) for the protection of boatmen in the Severn estuary against "many Welshmen and ill-disposed persons" who "were used to assemble in manner of war and stop trows, boats and floats or drags on their way with Merchandise to Bristol, Gloucester, Worcester, and other places, hewing these craft in pieces, and beating the sailors with intent to force them to hire boats from the said Welshmen, for great sums of money, an evil example and great impoverishment of a King's liege people, if remedy were not hastily provided."
Under this Act the Severn was declared a free river for all the King's subjects to carry on within the stream of the river. The Act made no mention, however, of any right on the part of the boatmen to use the land alongside the river for the purpose of towing their vessels; and in regard to this point the writer in the "Penny Cyclopædia" says: "Though a river is a public navigable river, there is not, therefore, any right at common law for parties to use the banks of it as a towing path."