Possible Clues:

• The king who thought he could hold back the tide
• King of England, Denmark and Norway
• Can he start to keep the water back? Never
• Danish king of England who tried to stop the tide
• For the most part can't stop the tide
• The king who thought he could stop the tide
• Danish king
• The king was a nut with an ace around
• A crazy fellow in church, he gave a sermon on the beach
• The king who couldn't stop the tide