Possible Clues:

• Roald —, first to reach the South Pole
• First man to reach South Pole
• South Pole explorer Roald
• A Frenchman, a Parisian, exchanged ends with explorer
• Roald -, Norwegian polar explorer
• Explorer — also German — succeeded and let it be put about
• First man to reach S Pole
• First to navigate the Northwest Passage
• The ____-Scott research station is the earth’s only inhabited place with 6-month days and nights
• He visited Pole and German, son's let it be put about