William La Varre, Up the Mazaruni for Diamonds
“ If the water was smooth and open, with no current, our twenty paddle men would sing as softly as the whispering of a summer breeze. But if there was a current they would sing louder. And the more difficult the paddling, the louder they would sing. In boiling rapids where it took every ounce of their strength and they had to take quick, short strokes to keep going, their voices arose to an almost howling crescendo. ”
