ANCIENT TRADE - In antiquity there was extensive trade between the Roman and Chinese “Sina” empires via the overland Silk Road through Asia and the Marine Silk Road via India and the Indies, to such an extent that Pliny complained about the excessive trade deficit. "There was no year in which India {Indies} does not drain the Roman empire of fifty million sesterces… So do we pay for our luxury and our women.” Roman trade and wars pushed the frontiers of the known world into the Caucasus, Africa, Arabia and the Silk Road. In 166 CE a Roman envoy arrived in China by sea. Rome had both land and sea maps to Asia, star charts used in conjunction with astrolabes for navigation, and weather and wind histories for the best times for travel.