Billethed or Billethead: How To spell?
The word Billethed is misspelled against Billethead, a noun meaning "A round piece of timber at the bow or stern of a whaleboat, around which the harpoon lone is run out when the whale darts off."
The word Billethed is misspelled against Billethead, a noun meaning "A round piece of timber at the bow or stern of a whaleboat, around which the harpoon lone is run out when the whale darts off."