...ch had before the cession been but one fifth of the whole country, was by this voluntary act of a slave State, increased to more than one-half. The relative extent of the two sections now stood thus: Free territory , 409,220 square miles; slave territory, 398,458 square miles.--Of the latter, the States of North Carolina, South Carolina and Georgia conveyed 142,856 miles to the United States, on condition that s...