Read it through once

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 right if that was Jim and not some other raftsman hollering. I couldn’t tell nothing about voices in a fog, for nothing don’t look natural nor sound natural in a fog.