The Constitution of the United States recognizes the slaves, held within some of the States of the Union, only in their capacity of persons — persons held to labor or service in a State under the laws thereof — persons constituting elements of representation in the popular branch of the National Legislature — persons, the migration or importation of whom should not be prohibited by Congress prior to the year 1808. The Constitution no where recognizes them as property. The words slave and slavery are studiously excluded from the Constitution. Circumlocutions are the fig-leaves under which these parts of the body politic are decently concealed. Slaves, therefore, in the Constitution of the United States are recognized only as persons, enjoying rights and held to the performance of duties.