IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  a +0 dagger
  5 stones
  a kobold corpse (skeletalised by now)
(1, -41, D:1)
  a hobgoblin corpse (skeletalised by now)
(1, -36, D:1)
  a +0 short sword
(1, -21, D:1)
  a +0 mace
(2, -8, D:1)
  a +0 robe
(5, -18, D:1)
  a frilled lizard skeleton
(5, -17, D:1)
  a +0 club
  a +0 whip
  a +0 dagger
  a goblin skeleton
(7, -50, D:1)
  3 poisoned darts
(10, -48, D:1)
  a bat corpse (skeletalised by now)
(18, -18, D:1)
  a book of Frost
(20, -50, D:1)
  a hobgoblin corpse (skeletalised by now)
(20, -16, D:1)
  a ball python corpse (skeletalised by now)
(22, -34, D:1)
  a +0 dagger of holy wrath
(26, -17, D:1)
  a bat skeleton
(37, -10, D:1)
  4 stones
  a kobold skeleton
(46, -19, D:1)
  a ball python skeleton
(47, -10, D:1)
  5 stones
(49, -11, D:1)
  a ball python skeleton
(51, -35, D:1)
  a maw talisman
(52, -11, D:1)
  a hobgoblin skeleton

Level 2 of the Dungeon
(0, 0, D:2)
  a ball python corpse (skeletalised by now)
(7, 7, D:2)
  a +0 leather armour
(8, 33, D:2)
  a +0 hand axe
(9, 5, D:2)
  a +0 spear
(9, 26, D:2)
  a frilled lizard skeleton
(9, 35, D:2)
  a +0 robe
  a hobgoblin corpse (skeletalised by now)
  an adder corpse (skeletalised by now)
(10, 16, D:2)
  a flux talisman
(13, -13, D:2)
  a +0 dagger
(13, 35, D:2)
  a hobgoblin corpse (skeletalised by now)
(14, 9, D:2)
  a +0 dagger
  5 stones
(15, 1, D:2)
  a +0 dagger
(15, 22, D:2)
  an adder corpse (skeletalised by now)
(17, 35, D:2)
  a dragon-blood talisman
(18, 35, D:2)
  4 poisoned darts
(29, 2, D:2)
  a bat skeleton
(32, 20, D:2)
  a +0 club
(38, 1, D:2)
  a +0 robe
(45, -2, D:2)
  a +0 short sword
  a kobold corpse (skeletalised by now)
(45, 4, D:2)
  a hobgoblin corpse
(49, 24, D:2)
  a +0 ring mail
(49, 25, D:2)
  6 poisoned darts
(50, -7, D:2)
  a quokka corpse (skeletalised by now)
(50, 0, D:2)
  a ball python corpse (skeletalised by now)
(53, 9, D:2)
  a frilled lizard corpse (skeletalised by now)

Level 3 of the Dungeon
(0, 4, D:3)
  a ball python corpse
(1, 4, D:3)
  a ball python corpse
(1, 7, D:3)
  a ribbon worm corpse