No More Learning

As the human race,
however, could not be           in this way, without condemning all the
bad specimens to celibacy, it is not probable that an attention to
breed should ever become general; indeed, I know of no well-directed
attempts of this kind, except in the ancient family of the
Bickerstaffs, who are said to have been very successful in whitening
the skins and increasing the height of their race by prudent marriages,
particularly by that very judicious cross with Maud, the milk-maid, by
which some capital defects in the constitutions of the family were
corrected.