As Corney and Pierre approached I waved to them to go on, pointing to the canoe to which Hugh was clinging.  They saw the necessity of at once going to his rescue, and so left me on the rock, where I was perfectly safe for the present.  There was need, in truth, for them to make haste, for already Hugh was drifting within range of the Indians' arrows, and they might shoot him in revenge for the long run we had given them.