Read it through once

'I should say so. I fancy we shan't run any of the river this trip as you've ever seen it run before--so to speak. If the river begins to rise again, we'll go up behind bars that you've always seen standing out of the river, high and dry like the roof of a house; we'll cut across low places that you've never noticed at all, right through the middle of bars that cover three hundred acres of river; we'll creep through cracks where you've always thought was solid land; we'll dart through the woods and leave twenty-five miles of river off to one side; we'll see the hind-side of every island between New Orleans and Cairo.'