QUOTE : We are not to forget, either, that Africa is inhabited by various tribes or nations of negroes--some more and some less degraded than the average...the white race exhibits some qualities of superiority over any other...The secret of the greater intelligence and aptitude of the Caucasian undoubtedly in great measure is to be attributed to the commingling of blood amongst its various branches; and this was evidently forced in large measure by circumstances under divine control.