Were Adam Smith alive, he might, and probably would, take some trouble to inform his countrymen that a system which looked to the exhaustion of the land of other countries, and the enslavement of their population, was "a manifest violation of the most sacred rights of mankind;" but since his day the doctrines of the "Wealth of Nations" have been discarded, and its author would find himself now addressing hearers more unwilling than were even the men for whom he wrote eighty years since. At that time the imaginary discovery had not been made that men always commenced on the rich soils, and passed, as population and wealth increased, to poorer ones; and the Malthusian law of population was yet unthought of. Now, however, whatever tends to limit the growth of population is, we are told, to be regarded as a great good; and as the domestic slave trade accomplishes that object at the same time that it furnishes cheap cotton, it can scarcely be expected that there will be any change; and yet, unless a change be somewhere made, abroad or at home, we must perforce submit to the continuance of the existing system, which precludes education, almost eschews matrimony, separates husbands and wives, parents and children, and sends the women to the labours of the field. CHAPTER XI. HOW SLAVERY GROWS IN PORTUGAL AND TURKEY. In point of natural advantages, PORTUGAL is equal with any country in Western Europe. Her soil is capable of yielding largely of every description of grain, and her climate enables her to cultivate the vine and the olive. Mineral riches abound, and her rivers give to a large portion, of the country every facility for cheap intercourse; and yet her people are among the most enslaved, while her government is the weakest and most contemptible of Europe. It is now a century and a half since England granted her what were deemed highly important advantages in regard to wine, on condition that she should discard the artisans who had been brought to the side of her farmers, and permit the people of England to supply her people with certain descriptions of manufactures. What were the duties then agreed on are not given in any of the books now at hand, but by the provisions of a treaty made in 1810, cloths of all descriptions were to be admitted at a merely revenue duty, varying from ten to fifteen per cent. A natural consequence of this system has been that the manufactures which up to the date of the Methuen treaty had risen in that country, perished under foreign competition, and the people found themselves by degrees limited exclusively to agricultural employments. Mechanics found there no place for the exercise of their talents, towns could not grow, schools could not arise, and the result is seen in the following paragraph:--