IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  a stone
(1, 28, D:1)
  a quokka corpse (skeletalised by now)
(13, 27, D:1)
  a +0 leather armour
(20, -26, D:1)
  8 stones
(23, -22, D:1)
  a +0 club
  a +0 club
  a +0 club
  a goblin skeleton
(32, 11, D:1)
  a ball python skeleton
(34, 21, D:1)
  a hobgoblin skeleton
(37, -14, D:1)
  a +0 dagger
(39, 11, D:1)
  a goblin skeleton
(43, -32, D:1)
  a rat corpse (skeletalised by now)
(48, -22, D:1)
  a rat skeleton
(50, -22, D:1)
  a +0 robe
(55, 1, D:1)
  a hobgoblin skeleton

Level 2 of the Dungeon
(0, 0, D:2)
  a +0 dagger
(14, -8, D:2)
  a +0 morningstar
  a +0 leather armour
(14, -5, D:2)
  a +0 club
  a boomerang
(14, 2, D:2)
  a serpent talisman
(16, -11, D:2)
  a +0 hand axe
  a +0 ring mail
  an orc corpse (skeletalised by now)
(18, -21, D:2)
  a +0 short sword
  a kobold skeleton
(21, -35, D:2)
  a +0 dagger
  a goblin corpse (skeletalised by now)
(29, 3, D:2)
  a ball python skeleton
(29, 12, D:2)
  a +0 club
(33, -33, D:2)
  a +0 dagger
  4 stones
(39, 13, D:2)
  a +0 club
  a goblin skeleton
(40, -21, D:2)
  a hobgoblin skeleton
(42, 0, D:2)
  a +0 club
  a goblin corpse (skeletalised by now)
(48, -10, D:2)
  a +0 sling
  a +0 dagger
  a goblin corpse (skeletalised by now)
(48, 4, D:2)
  a ball python corpse (skeletalised by now)

Level 3 of the Dungeon
(0, 0, D:3)
  a +0 tower shield
(23, 10, D:3)
  a +0 dagger
  a goblin corpse
(25, 10, D:3)
  a +0 club
(41, 21, D:3)
  a scroll of poison