Under their unquestioned power of defining crimes, their police power in criminal and sanitary matters, the States may forbid or make criminal miscegenation.

An extensive miscegenation of the races in these cities had given rise to a very intelligent class of slaves and a considerable number of thrifty free persons of color, in whom the best people early learned to show much interest.

Here we are at sea as to the extent to which this invasion and subsequent miscegenation of the black and red races extended for the reason that neither the Indians nor these migrating Negroes kept records and the United States Government has been disposed to classify all mixed breeds in tribes as Indians.