. . .ffluent on the left, which we followed up to its source. Climbing to the top of the hill, we found ourselves upon a sort of divide, which we slowly descended by an almost perpendicular trail over huge, slippery rocks and rolling cobble-stones to the bottom of a deep, narrow cañon, formed by another small, torrential quebrada. All the rest of the day we followed the course of this stream, which we crossed no less than thirty-four times. Occasionally the cañon, always steep and narrow, became merely vertical walls of rock, rising from the edge of the stream upwards to a height of from fifty to a hundred metres. In these places we were compelled to wade down the bed of the stream, while on other occasions the trail, about six inches wide, passed along the perpendicular face of some wet, slippery rock, forty or fifty feet above the river. How the Indians passed such places, carrying the heavy bultos[29] that weighed from eighty to a hundred pounds, is beyond my . . . Read More