About the middle of the last or eighteenth century, the true value of the Highlands of Scotland, and the best interests of these extensive districts, may be said for the first time to have been understood. Since that period, the object of the Government has been more especially directed to the industry of the inhabitants, in giving every encouragement and facility to the establishment of fisheries, towns and harbours, along the shores of the north and west of Scotland; and in opening interior communications, by the introduction of a system of roads, the formation of an extensive inland navigation, and the execution of other national works. [Sidenote: Extension of Trade.] Soon after the internal disturbances which marked the year 1745, the trade on the coast of Scotland with sloops or vessels of small tonnage, became considerable, in consequence of the bounties and encouragement given to the extension of the British fisheries. About this time also, the important manufacture of kelp or marine alkali, from certain species of _fuci_ abundant on the northern and western shores of Scotland, was introduced. Besides carrying the kelp to market, a considerable number of small vessels was employed in conveying salt and other articles required for the fisheries,--in the Irish coasting trade,--in carrying slates from Argyleshire,--and in transporting the rich iron-ore of Cumberland to the foundries on the eastern shores of the kingdom. A trade was likewise carried on from the Firth of Clyde, Liverpool, and the west of England in general, and north of Ireland, with Norway, the Baltic, and the other States in the north of Europe, in timber, iron, tar and other commodities; and in exchange for these were received coal, salt, and the various exports of Britain. These all became sources of commerce, which created a demand for shipping, and promoted numerous voyages along the northern and western coasts of Scotland, which now became more known and frequented. But such was the length and peril of a voyage round the coast of Scotland, by the Orkneys and Western Islands, without the aid of light-houses, or even of correct charts, that the traffic along these shores was still comparatively small. [Sidenote: Inland Navigation.]