It was George Washington's great-grand-nephew who was a captive at Harper's Ferry, Lewis William Washington. 

 

It's really difficult to fathom the Sumner-Brooks debacle. Check out some primary sources here. https://www.senate.gov/artandhistory/history/minute/The_Caning_of_Senator_Charles_Sumner.html

 

It's called the Burned Over district because the Second Great Awakening set the area "on fire." 

https://en.m.wikipedia.org/wiki/Burned-over_district#:~:text=The%20Burned%2Dover%20District%20refers,set%20the%20area%20on%20fire.

 

John Brown's Body was not only a marching song for the Union army, but also later a poem and play, both based on Stephen Vincent Benét's 1928 epic poem of the same title.