Riddle

Level 1 of the Dungeon
(0, 0, D:1)
  a hobgoblin corpse
(0, 3, D:1)
  a rat corpse (skeletalised by now)
(7, 5, D:1)
  a bat corpse
(19, 0, D:1)
  a stone
(20, -15, D:1)
  a +0 club
(21, 6, D:1)
  a +0 dagger
  4 stones
  a kobold corpse
(24, 13, D:1)
  a +0 club
(27, -12, D:1)
  a rat corpse (skeletalised by now)
(30, 3, D:1)
  a +0 club (still there?)
  a kobold corpse (still there?)
(31, 3, D:1)
  a goblin corpse