The wider and smoother rivers were crossed on 'balsas,' or rafts with sails.
Their boats or balsas were looked upon as ingenious contrivances.
The sun was as hot as upon the llanos along the river Balsas in Michoacan.
It was market day, and the balsas were carrying the peasants homeward.
We built a fleet of balsas with reeds and blown-out sheepskins, and followed him.