Rare. First edition. Fully illustrated with numerous plates depicting Amazonian native people and their environment. Contains notes on the exploration of the Amazon and materials on the Roosevelt-Rondon expedition. 

The Roosevelt-Rondon expedition, which took place in 1913-14, was a survey expedition to follow the path of the Rio da Dúvida ("River of Doubt") in the Amazon Basin. The expedition was jointly led by Theodore Roosevelt, the former US President, and Colonel Candido Rondon, a Brazilian explorer who had discovered its headwaters in 1909. They also collected many new animal and insect specimens. The river was eventually named "Rio Roosevelt" for the former president. He nearly died during the voyage and his health was permanently damaged.

Full title: Missao Rondon. Apontamentos sobre os trabalhos realizados pela Commisao de Linhas Telegrahicas Estrategicas de Matto-Grosso ao Amazonas sob a direccao do Coronel de Engenharia Candido Mariano da Silva Rondon de 1907 a 1915