QED

the Dungeon
(0, 0, D)
  a dart slug corpse
(0, 1, D)
  2 arrows
(0, 3, D)
  a dart slug corpse
(0, 5, D)
  a rat corpse
  a dart slug corpse
(0, 6, D)
  an arrow (still there?)
  a rat corpse (still there?)