Sentence:  In one place, the ony point we have found a break, the central portion of the cliff opens back, on either hand, into a low alluvial valley; where the marigolds, as we are informed, in spring time burn like fiery stars amid the rank marsh-grasses; and out of this a famous trout-stream comes gliding, slipping down from musical <WSD>waterbreak</WSD> to <WSD>waterbreak</WSD>, and then away quietly over the yellow sands to the sea. 
Meaning of the word marked with <WSD> tags:  A break in the smooth surface of a body of water, such as a ripple, whitecap, or the roughness that results from water flowing over an uneven surface.