Annie S. Peck,
Industrial and commercial South America
(1922)
“ The Tocantins River is a great artery of Brazil flowing from south to north a distance of 1600 miles, with a west affluent, the Araguaya, almost its equal in size and 1000 miles long above the union. Both rivers receive many tributaries. The flat broad valleys are overlooked by steep bluffs. The cataracts and rapids which occur on nearly all of the rivers as they come down from the plateau greatly interfere with navigation, but in their lower courses many are navigable for hundreds of miles, the Tocantins for 130. ”
