IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  a hobgoblin corpse (skeletalised by now)
(1, -26, D:1)
  a ball python corpse (skeletalised by now)
(12, 3, D:1)
  a ball python corpse (skeletalised by now)
(15, 3, D:1)
  a hobgoblin corpse (skeletalised by now)
(16, -18, D:1)
  7 stones
(22, -17, D:1)
  a +0 club
  a goblin skeleton
(44, -2, D:1)
  a +0 club
(46, 11, D:1)
  a rat corpse (skeletalised by now)

Level 2 of the Dungeon
(0, 0, D:2)
  a +0 short sword
  3 stones
(17, 9, D:2)
  a ball python corpse (skeletalised by now)
(17, 10, D:2)
  a +0 sling
(22, -15, D:2)
  a +0 dagger
  a goblin corpse (skeletalised by now)
(26, 13, D:2)
  a bat skeleton
(29, 12, D:2)
  a frilled lizard skeleton
(33, 22, D:2)
  a ball python corpse (skeletalised by now)
(34, 1, D:2)
  4 stones
  a +0 short sword
  a kobold corpse (skeletalised by now)
(48, 22, D:2)
  a +0 whip
(49, 22, D:2)
  a +0 short sword
  2 stones
  a kobold corpse (skeletalised by now)
(53, 22, D:2)
  a +0 dagger
  a goblin corpse (skeletalised by now)
(59, 9, D:2)
  a ring of poison resistance {rPois, !d}

Level 3 of the Dungeon
(0, 0, D:3)
  a hobgoblin corpse (skeletalised by now)
(5, 7, D:3)
  a +0 hand axe
(6, -8, D:3)
  a +0 dagger
(8, -6, D:3)
  a +0 short sword
  a kobold skeleton
(9, -6, D:3)
  a +0 dagger
(22, -7, D:3)
  7 stones
(22, 0, D:3)
  a rat skeleton
(30, -3, D:3)
  5 stones
(31, 2, D:3)
  a +0 quarterstaff
(33, -4, D:3)
  a hobgoblin skeleton
(36, 9, D:3)
  a +0 flail
(37, -7, D:3)
  a bombardier beetle corpse
(37, 9, D:3)
  a +0 dagger
  a +0 leather armour
  an orc skeleton
(42, 26, D:3)
  4 poisoned darts
(44, -10, D:3)
  a +0 club
(44, 19, D:3)
  a +0 hand axe
  an orc corpse (skeletalised by now)
(47, 14, D:3)
  a hobgoblin skeleton
(48, 24, D:3)
  a flux talisman
(50, 14, D:3)
  a +0 whip
  an adder skeleton
  an orc skeleton
(55, -11, D:3)
  a +0 short sword

Level 4 of the Dungeon
(0, 0, D:4)
  a +0 dagger
  a +0 leather armour
  a +0 dagger
  a +0 leather armour
  an orc corpse
(4, 1, D:4)
  a scroll of fog