1770  (1792)  The rattles and rapids in the river are now broken up.
1792  (1911)  The term "rapid" is meant to describe shallow water, strong currents and a rocky bottom, which causes the whole surface of the water to appear foaming and white, like breakers at sea.
1829  Would they examine the rapids with care, and not the still sheets, the truth would be guessed much nearer.
1965  On our 1964 trip, since the maps were fairly recent, only about half of the rapids were shown.