I WHO IS THE MAJOR II THE STRANGE LANDING III IN THE MIDST OF THE PACK IV A MODERN BATTLE WITH CRIMINALS V AN INFERNAL MACHINE VI THE RACE IS ON VII A STRANGE PEOPLE VIII THE WALRUS HUNT IX FIGHTING THEIR WAY OUT X TO THE TREASURE CITY XI A BATTLE BENEATH THE ARCTIC MOON XII THE RUSSIAN TIGER XIII BRUCE AND THE BEAR XIV "BOMBED" XV THE MYSTERY CAVERN XVI WRECKED XVII "SO THIS IS THE POLE"