Ancient Discoveries : Ancient Secret Agents (2009)
Directed by Ben Mole / Ali McGrath
Genres - Science & Technology, Historical Film |
Run Time - 60 min. |
Countries - Australia, United Kingdom, United States |
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Synopsis
Ancient espionage is examined, including the methods for sending covert messages, such as fire beacons, traveling by horse, and carrier pigeons. Also: invisible ink; and ninjas.