IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  a bat skeleton
(3, -1, D:1)
  a hobgoblin skeleton
(4, 14, D:1)
  a ball python skeleton
(5, 13, D:1)
  a rat skeleton
(7, -7, D:1)
  4 stones
(12, -17, D:1)
  a rat skeleton
(18, -12, D:1)
  a +0 club
  a kobold skeleton
(19, 2, D:1)
  a frilled lizard skeleton
(21, 4, D:1)
  3 stones
(23, -16, D:1)
  a +0 club
(23, 4, D:1)
  3 stones
(25, -4, D:1)
  a rat corpse (skeletalised by now)
(26, -6, D:1)
  a +0 robe
(27, -8, D:1)
  a ball python corpse (skeletalised by now)
(27, -6, D:1)
  a +0 short sword
(33, -19, D:1)
  a +0 dagger
(33, 0, D:1)
  a kobold skeleton
(40, -11, D:1)
  a bat corpse (skeletalised by now)
(42, -5, D:1)
  a +0 sling

Level 2 of the Dungeon
(0, 0, D:2)
  a +0 club
  a goblin corpse (skeletalised by now)
(4, -1, D:2)
  a +0 robe
(7, -5, D:2)
  a +0 club
  a goblin skeleton
(7, -4, D:2)
  a bat corpse (skeletalised by now)
(8, -9, D:2)
  a +0 short sword
(12, 4, D:2)
  a dragon-blood talisman
(18, -1, D:2)
  a +0 dagger
  a stone
  a kobold corpse (skeletalised by now)
(19, 2, D:2)
  a +0 dagger
(22, -2, D:2)
  a quokka corpse (skeletalised by now)
(32, -27, D:2)
  a quokka skeleton
(35, -17, D:2)
  a rat skeleton
(38, -20, D:2)
  a quokka skeleton
(42, -10, D:2)
  a bat corpse (skeletalised by now)

Level 3 of the Dungeon
(0, 0, D:3)
  a +0 club
  a +0 leather armour
  an orc corpse
(24, -41, D:3)
  5 stones