One of the things which I admired most, in contemplating and noting down the affairs of this kingdom, was to think how and in what manner they can have made such grand and admirable roads as we now see, and what a number of men would suffice for their construction, and with what tools and instruments they can have levelled the mountains and broken through the rocks to make them so broad and good as they are. For it seems to me that if the Emperor should desire to give orders for another royal road to be made, like that which goes from Quito to Cuzco, or the other from Cuzco to go to Chile, with all his power I believe that he could not get it done; nor could any force of men achieve such results unless there was also the perfect order by means of which the commands of the Incas were carried into execution. For if the road to be made was fifty leagues long, or one hundred or two hundred, and though the ground was of the most rugged character, it would be done with diligent care. But their roads were much longer, some of them extending for over one thousand one hundred leagues along such dizzy and frightful abysses that, looking down, the sight failed one.