Theodor Koch-Gr nberg (1872-1924) was a noted German ethnologist and explorer whose work on the indigenous peoples of Brazil and Venezuela is still consulted by anthropologists, ethnologists and linguists. His most important publication was this five-volume account of his 1911-1913 expedition from the sandstone mountains bordering Brazil, Venezuela and Guyana through uncharted territory westwards to the Orinoco. Volume 1 describes the journey itself,...