Private Letters
Richard Fisher recounts techniques used for centuries to conceal the text of posted letters using letterlocking.
-DDLabels: Letterlocking, Postal security
posted by David Dial | 11:33 AM
Knowledge Handler
Information Sources & Information Sifting Techniques
About Me
- Name: David Dial
- Location: Cleveland, Ohio, United States
I am a retired librarian, most recently serving at Indiana Wesleyan University's Cleveland Education Center.
- Backyard Chickens
- Satellite Connectivity
- Victim Mentality
- Hypochlorous Acid as Hand Sanitizer
- Small Room Decorating
- Sudbury Impact Crater
- The Measure
- Cleveland Public Library
- Loud Budgeting
- Biblical Literalism
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