The gains of alien merchants were looked upon more unfavourably than those of English merchants. It was natural, therefore, that those of the former should be taxed more heavily than those of the latter. This distinction between the duties upon aliens and those upon English merchants, which was begun from ignorance, has been continued front the spirit of monopoly, or in order to give our own merchants an advantage, both in the home and in the foreign market.
With this distinction, the ancient duties of customs were imposed equally upon all sorts of goods, necessaries as well its luxuries, goods exported as well as goods imported. Why should the dealers in one sort of goods, it seems to have been thought, be more favoured than those in another? or why should the merchant exporter be more favoured than the merchant importer?
The ancient customs were divided into three branches. The first, and, perhaps, the most ancient of all those duties, was that upon wool and leather. It seems to have been chiefly or altogether an exportation duty. When the woollen manufacture came to be established in England, lest the king should lose any part of his customs upon wool by the exportation of woollen cloths, a like duty was imposed upon them. The other two branches were, first, a duty upon wine, which being imposed at so much a-ton, was called a tonnage; and, secondly, a duty upon all