![](https://nthumb.tpgimages.com/mid2_com_img/1339/7992/TOP10241980.jpg)
Optical communication. Historical artwork of a system of communication using a series of torches to indicate letters of the alphabet. This system was described by the Ancient Greek scholar Polybius around 200BC. A system of ten torches and two walls were used to spell out words by their constituent letters according to a grid of coordinates. Two torches on the left and one on the right, as seen, might indicate the letter 'B'. From La Telegraphie Historique by Alexis Belloc (1888).
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Details
Creative#:
TOP10241980
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
Model Release:
N/A
Property Release:
N/A
Right to Privacy:
No
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