Gaspar the Gaucho, A Story of the Gran Chaco

Excerpt: Spread before you a map of South America. Fix your eye on the point of confluence between two of its great rivers?the Salado, which runs south-easterly from the Andes mountains, and the Parana coming from the north; carry your glance up the former to the town of Salta, in the ancient province of Tucuman; do likewise with the latter to the point where it espouses the Paraguay; then up this...