Chingis [Genghis Khan] sent another son with an army to attack the Indians, and he conquered Lesser India. These black people are Saracens, and are called Ethiopians. This army advanced to make war on the Christians in Greater India. Hearing this, the king of that country, commonly called Prester John, assembled an army and went to meet them; and he made figures of men out of copper and set them in saddles on horses, putting fire inside them, and he placed men with bellows on the horses behind the copper figures, and with many such figures and horses fitted up like this they advanced to fight the Tartars.”