"Dea Man's Chest" (also known as Fifteen Men On A Dead Man's Chest or Derelict) is a fictional sailor's work song or "sea shanty" from Robert Louis Stevenson's novel Treasure Island (1883), and a later expanded poem by Young E. Allison (1891). It has since been used in many later works of art in various forms. It has been suggested that the sea shanty is related to either the Dead Chest Island in the British Virgin Islands or Isla de Caja de Muertos in Puerto Rico.