Such are the consequences of domestic slavery, according to the first aspect and appearance of things; but if we enter more deeply into the subject, we shall perhaps find reason to retract our hasty determinations. The comparison is shocking between the management of human creatures and that of cattle; but being extremely just when applied to the present subject, it may be proper to trace the consequences of it. At the capital, near all great cities, in all populous, rich, industrious provinces, few cattle are bred. Provisions, lodging, attendance, labour are there dear, and men find better their account in buying the cattle, after they come to a certain age, from the remoter and cheaper countries. These are consequently the only breeding countries for cattle; and by a parity of reason, for men too, when the latter are put on the same footing with the former. To rear a child in London till he could be serviceable would cost much dearer than to buy one of the same age from Scotland or Ireland, where he had been raised in a cottage, covered with rags, and fed on oatmeal or potatoes. Those who had slaves, therefore, in all the richer or more populous countries would discourage the pregnancy of the females, and either prevent or destroy the birth. The human species would perish in those places where it ought to increase the fastest, and a perpetual recruit be needed from all the poorer and more desert provinces. Such a continued drain would tend mightily to depopulate the state, and render great cities ten times more destructive than with us, where every man is master of himself, and provides for his children from the powerful instinct of nature—not the calculations of sordid interest. If London at present, without increasing, needs a yearly recruit from the country of 5000 people, as is commonly computed, what must it require if the greatest part of the tradesmen and common people were slaves, and were hindered from breeding by their avaricious masters? All ancient authors tell us that there was a perpetual flux of slaves to Italy from the remoter provinces, particularly Syria, Cilicia,​[45] Cappadocia, and the Lesser Asia, Thrace, and Egypt; yet the number of people did not increase in Italy, and writers complain of the continual decay of industry and agriculture. Where then is that extreme fertility of the Roman slaves which is commonly supposed? So far from multiplying, they could not, it seems, so much as keep up the stock without immense recruits. And though great numbers were continually manumitted and converted into Roman citizens, the numbers even of these did not increase till the freedom of the city was communicated to foreign provinces.