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Theodore Roosevelt (1858–1919). Through the Brazilian Wilderness. 1914.

Page 350

rubbermen. The Rio Branco entered from the left at 9° 38’. Our camp at 8° 49’ was nearly on the boundary between Matto Grosso and Amazonas. The confluence with the Aripuanan, which joined from the right, took place at 7° 34’. The entrance into the Madeira was at about 5° 20’ (this point we did not determine by observation, as it is already on the maps). The stream we had followed down was from the river’s highest sources; we had followed its longest course.