All along these highways, caravansaries, or tambos, as they were called, were erected, at the distance of ten or twelve miles from each other, for the accommodation, more particularly of the Inca and his suite and those who journeyed on the public business. There were few other travelers in Peru. Some of these buildings were on an extensive scale, consisting of a fortress, barracks, and other military works, surrounded by a parapet of stone and covering a large tract of ground. These were evidently destined for the accommodation of the imperial armies when on their march across the country. The care of the great roads was committed to the districts through which they passed, and under the Incas a large number of hands was constantly employed to keep them in repair. This was the more easily done in the country where the mode of traveling was altogether on foot; though the roads are said to be so nicely constructed that a carriage might have rolled over them as securely as on any of the great roads of Europe. Still in a region where the elements of fire and water are both actively at work in the business of destruction, they must, without constant supervision, have gradually gone to decay. Such has been their fate under the Spanish conquerors, who took no care to enforce the admirable system for their preservation adopted by the Incas. Yet the broken portions that still survive here and there, like the fragments of the great Roman roads scattered over Europe, bear evidence to their primitive grandeur, and have drawn forth the eulogium from a discriminating traveler, usually not too profuse in his panegyric, that “the roads of the Incas were among the most useful and stupendous works ever executed by man.” The system of communication through their dominions was still further improved by the Peruvian sovereigns by the introduction of posts, in the same manner as was done by the Aztecs. The Peruvian posts, however, established on all the great routes that conducted to the capital, were on a much more extended plan than those in Mexico. All along these routes, small buildings were erected, at the distance of less than five miles asunder, in each of which a number of runners, or chasquis, as they were called, were stationed to carry forward the dispatches of government. These dispatches were either verbal, or conveyed by means of quipus, and sometimes accompanied by a thread of the crimson fringe worn round the temples of the Inca, which was regarded with the same implicit deference as the signet-ring of an Oriental despot.