We, of course, were ready enough to follow this advice; so Jerry, Surley, and I, pushed on up the mountain as fast as we could climb towards the nearest herd of guanacoes.  They were of a light-brown colour, of about the size of a stag.  I should describe the animals we saw as having small heads, with large and brilliant eyes, thick lips, and ears long and movable.  The neck was very long, and kept perfectly upright, while the haunches were slightly elevated; so that they looked somewhat like little camels--the purpose of which, indeed, they serve when domesticated.  We could see several herds in different parts on the side of the mountain.  There was one low down near the path in the direction the doctor and his companions had taken.  They were feeding quietly, when one looked up, then another, and away the whole herd scampered at a tremendous rate up the mountain.  We thought that the sight of the doctor's party had put them to flight; and it showed us that we must be cautious in approaching the herd we had marked.  Old Surley was very eager to be after them, and we had great difficulty in keeping him back.