Dissertation on Slavery With a Proposal for the Gradual Abolition of it, in the State of Virginia Quotes

“The purchaser therefore calculated not upon the value of the labour of his slave only, but, if a female, he regarded her as "the fruitful mother of an hundred more:" and many of these unfortunate people have there been in this state, whose descendants even in the compass of two or three generations have gone near to realize the calculation.—The great increase of slavery in the southern, in proportion to the northern states in the union, is therefore not attributable, solely, to the effect of sentiment, but to natural causes; as well as those considerations of profit, which”
― St. George Tucker, Dissertation on Slavery With a Proposal for the Gradual Abolition of it, in the State of Virginia