THE HORSE PARTY ARRIVES AT LAST, BUT WITH HALF THE HORSES STOLEN--THE START ACROSS THE MOUNTAINS--MORE BLACKFEET IN THE WAY OBLIGE THE PARTY TO TAKE A STRANGE PASS--IT BECOMES COLDER--SNOW COMES ON--A PACK OF WOLVES--SLEIGHS AND SNOW-SHOES--IN THE HEART OF THE "ROCKIES"--CORNEY HAS A NARROW ESCAPE AND A COLD BATH--SNOW IN THE CANOES--DIFFICULTIES OF THE WAY--THE PASS AT LAST--A FEARFUL AVALANCHE.