IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  a potion of might
(0, 2, D:1)
  a +0 short sword
(5, 1, D:1)
  a bat skeleton
(9, -12, D:1)
  a rat corpse (skeletalised by now)
(10, -3, D:1)
  a hobgoblin corpse
(15, -10, D:1)
  a +0 scale mail
(23, -3, D:1)
  a ball python corpse
(26, -10, D:1)
  a +0 dagger

Level 2 of the Dungeon
(0, 0, D:2)
  a rat corpse
(7, -5, D:2)
  a +0 club