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By flame, drum and song
How did people communicate over distance in the ancient world? We answer this question by examining signal fires, talking drums, and languages composed entirely of whistling.
Here’s an article about whistle languages.
More Than 80 Cultures Still Speak in Whistles
Here are a couple of videos about whistle languages.
Sylbo, The Last Speakers of the Lost Whistling Language
Here’s an article about the history of long distance communication.
A Brief History of Long Distance Communication
Here’s a bit about the hydraulic telegraph.
The Hydraulic Telegraph of Aeneas
Here’s an article about ancient communication and the use of drums.
Primeval Communication and the Beat of the Drum
And here’s a video demonstrating some African drums.