Though David may be regarded unquestionably as the founder of the Scottish burghs, many were indebted to William for the earliest charters confirmatory of their original privileges. Monopoly was, as usual, ensured to the privileged class within the walls, no one being allowed to sell the produce of his lands or flocks except to burgesses;[519] commerce, thus forbidden to the nobility, was confined to the burgher class; and the result was the same all over Europe. There is not a trace amongst the Teutonic people, in early times, of that broad line of distinction which grew up in a later age between the soldier and the merchant, the man of arms and the man of commerce--though the few actual trades, or rather handicrafts, of the period, were probably confined to the unfree. “Biorn the merchant” was the son of a king, and the spirit of commerce was strongly developed amongst the early Northmen. But the burghers claimed it as their exclusive privilege, and their monopolies were fostered and encouraged, stringent laws prohibiting the _upland_ nobility from entering into competition with the freemen within the walls; and accordingly they soon grew to despise pursuits in which they were thus precluded from engaging. No such restrictions existed in Italy, and her merchants were amongst the noblest in the land. Elsewhere the exclusive monopolies of a _Roturier_ class very much contributed to stamp commerce, in the Middle Ages, as a pursuit generally confined to the low-born. David’s commercial, like his religious, foundations were principally to the southward of the Forth--his views were directed towards Northumberland--and though many of his burghs were planted to the northward of that river, and particularly in the forfeited province of Moray, it is from the confirmatory charters of William that their existence is first discovered. Not a few additions were also made by William to the number of Scottish burghs--foremost in importance to future ages the bishop’s burgh of Glasgow--and Galloway, Scottish Cumbria, and the northern and eastern coasts of Scotland proper, were studded with commercial garrisons. Berwick still appears to have monopolized the foreign trade, and its importance may be best appreciated by the clause inserted in one of the treaties between John and William, engaging the English king to stop the further progress of the castle at Tweedmouth, which had evidently been intended to aim a fatal blow at the most flourishing emporium of Scottish commerce.[520] But it was upon the northern and eastern coasts of _Scotia_ proper, and upon that portion of the northern coast which had been reclaimed from _Moravia_ by the establishment of Inverness, that the progress and advancement of the kingdom were most marked in William’s reign. David’s favourite residences appear to have been generally in the south and centre of his kingdom, but William was often in the north, and many of his charters are dated