raft come booming down so lively she tore it out by the roots and away she went.  I see the fog closing down, and it made me so sick and scared I couldn't 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