IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  a +0 short sword
(1, 0, D:1)
  a rat skeleton
(5, -10, D:1)
  a bat skeleton
(6, -15, D:1)
  a ball python skeleton
(7, -15, D:1)
  a frilled lizard skeleton
(15, -19, D:1)
  a +0 club
  a kobold skeleton
  a hobgoblin skeleton
(17, -5, D:1)
  a bat skeleton
(17, 1, D:1)
  a +0 short sword
  a stone
  a kobold skeleton
(18, -7, D:1)
  a +0 whip
  a gnoll corpse (skeletalised by now)
(27, -8, D:1)
  a +0 dagger
  a goblin skeleton
(27, -3, D:1)
  a hobgoblin skeleton
(28, -27, D:1)
  a rat corpse (skeletalised by now)
(31, -4, D:1)
  a +0 dagger
(34, -28, D:1)
  a +0 club
  a kobold corpse (skeletalised by now)

Level 2 of the Dungeon
(4, 4, D:2)
  an adder corpse (skeletalised by now)
(9, 0, D:2)
  a +0 robe
(22, 11, D:2)
  a +0 heavy hand axe
(26, 10, D:2)
  a jackal skeleton
(27, -19, D:2)
  a +0 robe
(27, 23, D:2)
  a +1 dagger of draining
(30, 8, D:2)
  a +0 dagger
(32, 2, D:2)
  a +0 dagger
(33, -21, D:2)
  a +0 crystal plate armour
(39, -1, D:2)
  2 stones
(39, 2, D:2)
  a +0 spear
(39, 3, D:2)
  a +0 spear
  a gnoll skeleton
(43, 4, D:2)
  a +0 spear
  a gnoll skeleton
(45, 12, D:2)
  a +0 ring mail
(46, -1, D:2)
  a quokka skeleton
(49, -8, D:2)
  a +0 plate armour

Level 3 of the Dungeon
(0, 0, D:3)
  a wand of flame (3)
(1, -12, D:3)
  a scroll of identify
(2, -13, D:3)
  a +0 mace
(3, 6, D:3)
  a scroll of blinking
(17, 6, D:3)
  3 scrolls of revelation