Having thus enacted that the sole vehicle of colonial commerce should be Spanish, the next effort of the paternal government was to make the things it conveyed Spanish also. As an adjunct in this system of imposition, the laws of the Indies prohibited the manufacture or cultivation in the colonies, of all those articles which could be manufactured or produced in Spain. Factories were therefore inhibited, and foreign articles were permitted to enter the viceroyalties, direct from Spain alone, where they were, of course, subjected to duty previous to re-exportation. But these foreign products were not allowed to be imported in unstinted quantities. Spain fixed both the amount and the price; so that by extorting, ultimately, from the purchaser, the government was a gainer in charges, profits and duties; whilst the merchants of Cadiz and Seville, who enjoyed the monopoly of trade, were enabled to affix any valuation they pleased to their commodities. The ingenuity of the Spaniards in contriving methods to exact the utmost farthing from their submissive colonists, is not a little remarkable. "They took advantage of the wants of the settlers, and were, at one time, sparing in their supplies, so that the price might be enhanced, whilst, at another, they sent goods of poor quality, at a rate much above their value, because it was known they must be purchased. It was a standing practice to despatch European commodities in such small quantities as to quicken the competition of purchasers and command an exorbitant profit. In the most flourishing period of the trade of Seville, the whole amount of shipping employed was less than twenty-eight thousand tons, and many of the vessels made no more than annual voyages. The evident motive on the part of the crown for limiting the supply was, that the same amount of revenue could be more easily levied, and collected with more certainty as well as despatch, on a small than on a large amount of goods."[22] Whilst the commerce of Spain was thus burdened by enormous impositions, the colonies were of course cramped in all their energies. There could be no independent action of trade, manufacture, or even agriculture, under such a system. America,--under the tropics and in the temperate regions, abounding in a prolific soil,--was not allowed to cultivate the grape or the olive, whilst, even some kinds of provisions which could easily have been produced on this continent were imported from Spain.