The Supreme Court of the United States, in a recent case, has, by a decision of seven to two of the Judges, established as law what our Southern statesmen have been repeating daily for many years on the floors of Congress, that the whole action of this Government on the subject of slavery, for more than a quarter of a century, from the initiation of the Missouri Restriction in 1822, to the California Compromise in 1850, has been all beyond the limits of the Constitution; was without justifiable authority; and that the whole mass should be now proclaimed null and void, and that slavery is guaranteed by the constitutional compact.