| Communication in antiquity, illustration. Alphabetic signals made by torches, invented by the greek historian Polybius (II century. B. C. ). Engraving in: Les Merveilles de la Science (The Wonders of Science), by Louis Figuier, France, 1868. | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / CCI Archives |
| Taille de l’image : | 4794 px × 3645 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |