The September 1858 issue of Atlantic Monthly…
September 1858 CE
The September 1858 issue of Atlantic Monthly includes a poem by John Greenleaf Whittier called Le Marais du Cygne, alluding to the Marais des Cygnes Massacre of May, which has horrified the nation.
The last verse is:
On the lintels of Kansas
That blood shall no dry;
Henceforth the Bad Angel
Shall harmless go by;
Henceforth to the sunset
Unchecked on her way,
Shall Liberty follow
The march of the day.