HUGH'S CANOE ARRESTED BY RED SQUIRREL JUST IN TIME--THE CANOE SAVED--ALL GOT UP THE RAPIDS AT LAST--CAMP AT THE TOP--THE BLACKFEET REACH THE CAMP TO FIND THE PARTY GONE--THE INDIANS PURSUE, AND UNCLE DONALD LIES BY FOR TWO DAYS ON AN ISLAND--END OF THE WATER PASSAGE--THE HORSES DO NOT APPEAR.