
“Say to the seceded States, "Wayward sisters, depart in peace."”
Letter http://www.familytales.org/dbDisplay.php?id=ltr_wfs1343&person=wfs to William H. Seward (3 March 1861); though the only suggestion from this letter commonly quoted, this was actually the last and final alternative of what he considered to be 4 options available to President Abraham Lincoln in dealing with the secessionist states.