Thence it pursues its way to the head of the fall in a rough, solid rock channel, dashing on side angles, heaving in heavy surging masses against elbow knobs, and swirling and swashing in pot-holes without a moment's rest.

从那里，它在崎岖不平的坚硬岩石通道中追赶着瀑布的源头，在侧角上冲刺，在肘部旋钮上涌动着沉重的涌动，在坑坑洼洼的地方不停地旋转和晃动。