What happened in the 1880s?
π΅οΈββοΈ Foundation of the Pinkerton National Detective Agency (1884): Corporate security and private policing.
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Further Reading
Our Story | Pinkerton (pinkerton.com)
Pinkerton (detective agency) - Wikipedia (wikipedia.org)
Pinkerton National Detective Agency | History & Facts - Britannica (britannica.com)
Our Story | Pinkerton (pinkerton.com)
From Private Eyes to Philanthropy - The Pinkerton Foundation (thepinkertonfoundation.org)
The Historical Significance of Pinkerton - Silent Professionals (silentprofessionals.org)
Pinkerton's National Detective Agency records, | Library of Congress (loc.gov)
From Pinkertons to Private Investigators: A Historical Journey (eliteceu.com)