VII THE BATTLE IN THE AIR

VIII BOMBING THE BRIDGE

IX CONVINCING PROOF

X GROPING FOR LIGHT

XI THE AMAZING PLAN

XII GRIPPED IN SUSPENSE

XIII OFF FOR THE CHANNEL

XIV READY FOR THE START

XV THE LONG FLIGHT BEGUN

XVI THE FIRST NIGHT OUT

XVII WHEN THE SUBMARINE STRUCK

XVIII THE COLD HAND OF FEAR

XIX A DESPERATE CHANCE

XX ON THE ICE FLOE

XXI ATTACKED BY A POLAR BEAR