The empire of Peru is so vast, that the Incas ordered a road to be made, as I have already stated on many occasions, from Chile to Cuzco, and even from the river of Maule[132] as far as the river Angasmayu.[133] If the king was at one of these extreme points, he could be informed of what had taken place at the other; but for one man to make such a journey, even by very long marches, it would take a considerable time. At the end of a journey, of a 1,000 leagues, there might be no time left to take the needful measures, and to remedy any wrong step that had been made. The Incas therefore, with a view to the efficient government of the empire, invented a system of posts, which was the best that could be thought of or imagined. The system is entirely due to the Inca Yupanqui, who was son of Viracocha Inca, and father of Tupac Ynca, according to the accounts given in the songs of the people, and in the statements of the Orejones. The Inca Yupanqui not only invented the system of the posts, but he did other great things, as I shall presently relate. From the time of his reign, throughout all the royal roads, there were built, from half-league to half-league, a little more or less, small houses well roofed with wood and straw; and among the mountains they were constructed against the rocks. Thus the roads were lined with these small houses at regular intervals. The order was that in each house there should be two Indians with provisions, stationed there by the neighbouring villages.[134] They were not permanently left there, but were relieved by others from time to time; and the system of government was so efficient that it was only necessary to give the order, to ensure that these men should always be at their stations so long as the Incas reigned. Each province took charge of the posts within its boundaries, including those which were on the coast deserts or in the region of snowy heights. When it was necessary to give notice to the kings in Cuzco, or in any other part, of any event that had taken place, or which was connected with their service, the men at the posts set out from Quito or Tomebamba, or from Chile or Caranqui, or from whatever other part of the empire, whether along the coast or in the mountains, and they ran with great speed, without stopping, each one over his half league. For the Indians who were stationed at the post houses, were chosen from among the most active and swiftest of all their countrymen. When one approached the next post house, he began to call out to the men who were in it, and to say:--“Start at once, and go to the next post with news that so and so has happened, which such a Governor wishes to announce to the Inca.” When the other runner heard what was shouted to him, he started with the utmost speed, while the runner who arrived went into the house to rest, and to eat and drink of what was always kept in store there; while the other did, in like manner, at the next post house.