Because the sound of the paddle stroke moving rapidly toward the north shows it.

Doubtless some of Sharp Sword's warriors brought with them a canoe overland, and they are now using it to spy upon us." "What can we do about it, Tayoga ?" "Nothing, Red Coat.

Ah, the canoe has turned and is now going back toward the south, but more slowly.

The man in it could locate our camp easily by the glow of the fires through the mist and vapors.

Perhaps he can see a dim outline of our figures." "And one of us may get a bullet while we stand here watching." "No, Red Coat, it is not at all likely.