Letter from a Birmingham Jail
Letter from a Birmingham Jail by Dr. Martin Luther King Junior
Publicly available from the University of Pennsylvania African Studies Center, Dr. King’s response to letters from clergy who did not approve of the non-violent methods used by the Civil Rights leaders and accused the participants of being “outside agitators”.
https://swap.stanford.edu/was/20141218230016/http://mlk-kpp01.stanford.edu/kingweb/popular_requests/frequentdocs/birmingham.pdf