Title: Lectures delivered by Colonel Candido Mariano da Silva Rondon, Chief of the Commission, on the 5th, 7th and 9th of October 1915 at the Phenix Theatre of Rio de Janeiro, on the Roosevelt-Rondon Scientific Expedition and the Telegraph Line Commission
Subjects: Brazil, Brazil. Comissão de Linhas Telegráficas Estratégicas de Mato Grosso ao Amazonas, Discovery and exploration, Roosevelt-Rondon Scientific Expedition (1913-1914), Telegraph
Places: Brazil