Eugenio Alvarado, a Spanish commissioner for the boundary delimitation of Colombia with Brazil in 1759, informed the viceroy at Bogota that the rivers Arivari and Guayabero rise between Neiva and Popayan, and unite to take the composite name of Guaviare.
The principal tributaries of the Magdalena are the Suaza, Neiva, Cabrera, Prado, Fusagasaga, Funza or Bogota, Carare, Opon, Sogamoso, Lebrija and Cesar, and the western the La Plata, Paez, Saldana, Cuello, Guali, Samana or Miel, Nare or Negro and Cauca.
The river is also navigable at high water for small steamers up to Neiva, 100 m.
The tribes of the Caribbean seaboard, from Chiriqui to Goajira, are generally attached to the great Carib stock; those of the eastern plains show affinities with the neighbouring Brazilian races; those of the elevated Tuquerres district are of the Peruvian type; and the tribes of Antioquia, Cauca, Popayan and Neiva preserve characteristics more akin to those of the Aztecs than to, any other race.
The seven new departments are: Atlantico, taken from the northern extremity of Bolivar; Caldas, the southern part of Antioquia; Galan, the southern districts of Santander, including Charala, Socorro, Velez, and its capital San Gil; Huila, the southern part of Tolima, including the headwaters of the Magdalena and the districts about Neiva and La Plata; Narino, the southern part of Cauca extending from the eastern Cordillera to the Pacific coast; Quesada, a cluster of small, wellpopulated districts north of Bogota formerly belonging to Cundinamarca, including Zipaquira, Guatavita, Ubate and Pacho; and Tundama, the northern part of Boyaca lying on the frontier of Galan in the vicinity of its capital Santa Rosa.