Chicago Pinkerton Detective
Agency Case Letter, 1921
1921 letter from the Pinkerton Detective Agency Co. petitioning the Wisconsin
Assembly on their behalf. A very interesting letter relating the bomb-making
activites of a Socialist group in the east and how their operatives need
freedom to uncover similar activites.
Ralph D. Thomas PI Vintage Collection
THOMAS INVESTIGATIE PUBLICATIONS, INC.
NATIONAL ASSOCIATION OF INVESTIGATIVE SPECIALISTS, INC.
SPY EXCHANGE AND SECURITY CENTER
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To The Spy And PI Vintage Pages
2008, Thomas Investigative Publications, Inc. All rights reserved.
Thomas Investigative Publications, Trademark, 1981.
National Association Of Investigative Specialists, Inc, Trademark, 1986.
Spy Exchange, Trademark, 1989.