At this point, the most elevated of the Andes, the travelers were seized with a malady called by the Indians _soroche_, which deprives the most intrepid man of his courage and his strength. A superhuman will is then necessary to keep one from falling motionless on the stones of the road, and being devoured by those immense condors which display above their vast wings! These three men spoke little; each wrapped himself in the silence which these vast deserts inspired. On the eastern slope of the Cordilleras, they hoped to find traces of their enemies; they therefore traveled on, and were at last descending the chain of mountains; but the Andes are composed of a great number of salient peaks, so that inaccessible precipices were constantly rising before them. Nevertheless they soon found the trees of inferior levels; the llamas, the vigonias, which feed on the thin grass, announced the neighborhood of men. Sometimes they met _gauchos_ conducting their _arias_ of mules; and more than one _capataz_ (leader of a convoy) exchanged fresh animals for their exhausted ones. In this manner they reached the immense virgin forests which cover the plains situated between Peru and Brazil; they began thenceforth to recover traces of the captors; and it was in the midst of these inextricable woods that Martin Paz recovered all his Indian sagacity. Courage returned to the Spaniard, strength returned to Liberta, when a half-extinct fire and prints of footsteps proved the proximity of their enemies. Martin Paz noted all and studied all, the breaking of the little branches, the nature of the vestiges. Don Vegal feared lest his unfortunate daughter should have been dragged on foot through the stones and thorns; but the Indian showed him some pebbles strongly imbedded in the earth, which indicated the pressure of an animal's foot; above, branches had been pushed aside in the same direction, which could have been reached only by a person on horseback. The poor father comforted himself and recovered life and hope, and then Martin Paz was so confident, so skillful, so strong, that there were for him neither impassable obstacles nor insurmountable perils. Nevertheless immense forests contracted the horizon around them, and trees multiplied incessantly before their fatigued eyes. One evening, while the darkness was gathering beneath the opaque foliage, Martin Paz, Liberta and Don Vegal were compelled by fatigue to stop. They had reached the banks of a river; it was the river Madeira, which the Indian recognized perfectly; immense mangrove trees bent above the sleeping wave and were united to the trees on the opposite shore by capricious _lianes_ (vines), on which were balancing the _titipaying_ and the _concoulies_.