The creek narrowed to half its former width, and the greater part of even this contracted channel was rendered unnavigable by a long bar of gravel and grass, over which an inch or so of water crawled sluggishly. The main channel--only half a dozen feet wide--headed abruptly to the right, and swept at breakneck speed in a perfect half circle under the outwardly projecting base of a steep and wooded hill. Here and there the bushes hung down to meet the madly tossing waves, and swayed violently.