IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  2 stones
  a kobold skeleton
(2, 4, D:1)
  a frilled lizard skeleton
(10, 3, D:1)
  a +0 dagger
  a bat skeleton
(16, 1, D:1)
  a +0 plate armour
(19, 6, D:1)
  6 poisoned darts
(20, 29, D:1)
  4 boomerangs
(22, 34, D:1)
  a ball python skeleton
(27, -5, D:1)
  a ball python corpse (skeletalised by now)
(30, 6, D:1)
  a +0 spear
(35, 17, D:1)
  5 stones
(36, 38, D:1)
  a +0 whip
(39, 5, D:1)
  a quokka skeleton
(42, 23, D:1)
  a +0 short sword
(50, -6, D:1)
  a hobgoblin corpse (skeletalised by now)
(51, 23, D:1)
  a ball python skeleton
(51, 33, D:1)
  a bat corpse (skeletalised by now)
(57, -2, D:1)
  a frilled lizard corpse (skeletalised by now)
(61, 35, D:1)
  3 stones

Level 2 of the Dungeon
(3, 22, D:2)
  a +0 cloak
(6, 14, D:2)
  an adder corpse (skeletalised by now)
(6, 27, D:2)
  a +0 club
(7, -4, D:2)
  4 stones
(9, -9, D:2)
  an adder skeleton
(11, -3, D:2)
  a jackal skeleton
(12, -17, D:2)
  a +0 dagger
  3 stones
  a kobold corpse (skeletalised by now)
(12, -8, D:2)
  a jackal skeleton
(17, 1, D:2)
  a +0 dagger
(20, 8, D:2)
  a rat skeleton
(21, 5, D:2)
  a rat skeleton
(24, 9, D:2)
  a +0 dagger of draining
  a kobold skeleton
(25, -6, D:2)
  a +0 leather armour
(30, -6, D:2)
  a hobgoblin skeleton
(30, 18, D:2)
  a bat skeleton
(31, -10, D:2)
  a quokka skeleton
(31, 25, D:2)
  3 stones
(31, 28, D:2)
  a +0 whip
  a kobold corpse (skeletalised by now)
(34, 9, D:2)
  a +0 cloak
(38, -8, D:2)
  a +0 robe
(38, 6, D:2)
  a hobgoblin skeleton
(46, -7, D:2)
  a +0 club
(49, 24, D:2)
  a +0 robe

Level 3 of the Dungeon
(3, -7, D:3)
  a +1 dagger of pain
(5, 2, D:3)
  a +0 hand axe
(7, 2, D:3)
  a bat corpse (skeletalised by now)
(9, 2, D:3)
  a frilled lizard corpse (skeletalised by now)
(15, 0, D:3)
  a giant cockroach corpse
(16, 11, D:3)
  a ball python skeleton
(24, -2, D:3)
  5 stones
(29, 22, D:3)
  3 stones
(42, 10, D:3)
  a giant cockroach corpse
(43, 15, D:3)
  15 gold pieces
(44, 12, D:3)
  a scroll of identify