budge for most a half a minute it seemed to me--and then there warn't no raft in sight; you couldn't see twenty yards.  I jumped into the canoe and run back to the stern, and grabbed the paddle and set her back a stroke.  But she didn't come.  I was in such a hurry I hadn't untied her.  I got up and tried to untie her, but I was so excited my hands shook so I couldn't hardly do anything with them. As soon as I got started I took out after the raft, hot and heavy, right down the towhead.  That was all right as far as it went, but the towhead warn't sixty yards long, and the minute I flew by the foot of it I shot out into the solid white fog, and hadn't no more idea which way I was going than a dead man. Thinks I, it won't do to paddle; first I know I'll run into the bank or a towhead or something; I got to set still and float, and yet it's mighty fidgety business to have to hold your hands still at such a time.  I whooped and listened.  Away down there somewheres I hears a small whoop, and up comes my spirits.  I went tearing after it, listening sharp to hear it again.  The next time it come I see I warn't heading for it, but heading away to the right of it.  And the next time I was heading away to the left of it--and not gaining on it much either, for I was flying around, this way and that and t'other, but it was going straight ahead all the time. I did wish the fool would think to beat a tin pan, and beat it all the time, but he never did, and it was the still places between the whoops that was making the trouble for me.  Well, I fought along, and directly I hears the whoop _behind_ me.  I was tangled good now.  That was somebody else's whoop, or else I was turned around. I throwed the paddle down.  I heard the whoop again; it was behind me yet, but in a different place; it kept coming, and kept changing its place, and I kept answering, till by and by it was in front of me again, and I knowed the current had swung the canoe's head down-stream, and I was all ri