Chapter VI

.

GUMILLA, JOSEPH, _Historia natural, civil y geográfica de las naciones situadas en las riveras del Rio Orinoco_. 2 vols. Madrid, 1745; Barcelona, 1791; also, 1882.

HILHOUSE, WILLIAM, "Journal of a Voyage up the Massaroony in 1831," in _Journal of the Royal Geographical Society_, iv. Also, "Notices of the Indians settled in the Interior of British Guiana," ib. ii.

HUMBOLDT, [b]. See Bibliography to