Henry Walter Bates,
The Naturalist on the River Amazons
“ The Brazilians have lately taken to applying the convenient term Alto Amazonas (High or Upper Amazons) to the Solimoens, and it is probable that this will gradually prevail over the old name. The Rio Negro broadens considerably from its mouth upwards, and presents the appearance of a great lake; its black-dyed waters having no current, and seeming to be dammed up by the impetuous flow of the yellow, turbid Solimoens, which here belches forth a continuous line of uprooted trees and patches of grass, and forms a striking contrast with its tributary. ”
