Vigilance committee (English Wikipedia)

Krieger, Dan (July 13, 2013). "Lynch mobs part of area's history". The Tribune. Archived from the original on September 2, 2021. Retrieved May 29, 2020.

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Woolley, Lell Hawley (1913), "Vigilance Committee of 1856", CALIFORNIA : 1849-1913 or The Rambling Sketches and Experiences of Sixty-four Years' Residence in that State, Oakland, California, archived from the original on March 6, 2017, retrieved February 26, 2017{{citation}}: CS1 maint: location missing publisher (link)

"Arthursville abolitionists ran Underground Railroad through Pittsburgh". Archived from the original on 8 March 2012. Retrieved 9 January 2014.
"Gerrit Smith's Convention". Lehigh Register. Allentown, Pennsylvania. August 29, 1850. p. 2. Archived from the original on 2022-06-20. Retrieved 2022-06-20 – via Library of Congress Chronicling America.
Woolley, Lell Hawley (1913), "Vigilance Committee of 1856", CALIFORNIA : 1849-1913 or The Rambling Sketches and Experiences of Sixty-four Years' Residence in that State, Oakland, California, archived from the original on March 6, 2017, retrieved February 26, 2017{{citation}}: CS1 maint: location missing publisher (link)
Dresser, Amos (1836). The narrative of Amos Dresser : with Stone's letters from Natchez, an obituary notice of the writer, and two letters from Tallahassee, relating to the treatment of slaves. Link is to a reprinting in the collection Slave Rebels, Abolitionists, and Southern Courts. New-York: American Anti-Slavery Society. Archived from the original on 2022-06-20. Retrieved 2021-07-30.
Krieger, Dan (July 13, 2013). "Lynch mobs part of area's history". The Tribune. Archived from the original on September 2, 2021. Retrieved May 29, 2020.