The Pinkerton National Detective Agency reference article from the English Wikipedia on 24-Jul-2004
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Pinkerton National Detective Agency

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The Pinkerton National Detective Agency was founded in 1850 by Allan Pinkerton (1819-1884), an immigrant to the U.S. from Scotland.

Pinkerton is now a brand name for security guard services provided by Securitas.

Pinkertons were notorious for strike-breaking.

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