C39 The old lame's past

It was a clear river, and the current was very slow. It was late at night and we couldn't see what was in it, but the old cripple said that my grandfather's body was in the river. We were all shocked.

If it was really like what the old cripple said, that the corpse was in the river, then how would they go about salvaging it? Where to find a boat in the middle of the night