William L. Barney, "Memminger, Christopher Gustavus," American National Biography Online, February 2000, http://www.anb.org/articles/04/04-00702.html.
As late as January 1860, Memminger was still opposed to separate state secession. In that month he was sent by the governor as a special commissioner to Virginia. He addressed the Virginia legislature and urged the state to join South Carolina in its call for a southern convention "to concert measures for united action" in the wake of John Brown's raid. When he sensed that his mission had failed, Memminger concluded that "we farther South will be compelled to act and drag after us these divided states." He actively promoted South Carolina's secession in December 1860 and was selected to the provisional Confederate Congress that met in Montgomery, Alabama, in February 1861.