What is "chasqui"

The Chasquis (also Chaskis) were agile and highly trained and physically fit messengers that were in charge of carrying the quipus, messages and gifts throughout the Inca empire. A message could travel up to 240 km per day through the chasquis relay system. Chasquis were not just messengers (those were young boys who were just used to pass along basic information), the chasquis were trained to be able to read and translate the khipus to each other and higher authorities. Not only were they used to transport oral messages but they also helped the inspector general, the Sapa Inka's brother, keep track of the people in the empire.