The symbols on the blocks at the bottom of the knight's shield are the same as the Black Symbols on the manuscript. These same symbols are also engraved at the top of the knight's shield.
 

 
Study the order in which the symbols appear on the manuscript and at the top of the shield to find a pattern.
 
ON THE MANUSCRIPT:

CROSS | STAR | MOON | CROSS

  
  
  TOP OF THE SHIELD:STAR | MOON | CROSS | STAR
 
The sequence on the manuscript begins with a cross, which is repeated at the end. The sequence engraved at the top of the shield begins with second symbol, star, which is similarly repeated at the end.
 
Follow the pattern, beginning with the third symbol, and work out the sequence for the blocks.
 

MOON | CROSS | STAR | MOON