Possible Clues:

• Two-and-six in old money?
• Old Spanish coins
• Old Spanish silver coins that pirates were after
• <--
• 1+1+1+1+1+1+1+1 for Spain
• Old coins; '---!' (Long John Silver's parrot)
• Men on board belonging to the crew find some old coins
• Old coins - two reasonably circular shapes?
• Old coins: a one, a two, and a five?
• Silver parrot cry of coins in Treasure Island