Hirgon is a messenger sent from Gondor to ask Théoden for Rohan’s assistance in the battle at Minas Tirith. He carries a red arrow, which marks him out as an official messenger of war. The scouts of the Rohirrim find what appears to be Hirgon’s body on the path back to Minas Tirith, because although the head has been removed, the body still holds the red arrow.
Hirgon Character Timeline in The Return of the King
The timeline below shows where the character Hirgon appears in The Return of the King. The colored dots and icons indicate which themes are associated with that appearance.
Book 5, Chapter 3