it must be remembered that they had landed south of it, and at times the little animals became a positive nuisance.
Several days passed, and they crossed the Parana river and struck into the almost unpenetrated tract of land where Tom hoped to find the giants. As yet none of their escort dreamed of the object of the expedition, and though Tom had caused scouts to be sent back over their trail to learn if they were being followed there was no trace of any one.
One day, after a night camp on the edge of a rather high table land, they started across a fertile plain that was covered with a rich growth of grass.
"Good grazing ground here," commented Ned.
"Yes," put in San Pedro. "Plenty much horse here pretty soon."
"Do the natives graze their herds of horses here?" asked Tom.
"No natives—wild horses," explained Pedro "Plenty much, sometimes too many they come. You see, maybe."
It was nearly noon, and Tom was considering stopping for dinner if they could come to a good watering place, when Ned, who had ridden slightly in advance, came galloping back as fast as his steed would carry him.
