Possible Clues:

• The most virtuous knight of the King Arthur's Round Table
• The festivities had one noble, Sir
• Party held for noblest of knights
• Son of 9
• The festive occasion had been for the knight, pure and simple
• One big party cheated man of great virtue
• A celebration to be enjoyed for a night, we hear
• Party held for a knight
• Noble knight held back a prisoner initially
• Knight organised first celebration