"All right, but I fancy she won't be thinking about that. The matches are so she can see her way to you. It's awfully hard to follow a sound across the water, but if you light one match after another she can get to you before the supply gives out, if she's anywhere near. Don't light any till she answers. If she doesn't answer, I'll come down to you and we'll walk on up the river a little way and find her there."