IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  7 stones
(4, 27, D:1)
  a bat skeleton
(7, 6, D:1)
  a jackal skeleton
(14, 4, D:1)
  a stone
(14, 6, D:1)
  2 stones
(15, 5, D:1)
  a stone
(15, 6, D:1)
  a stone
(15, 7, D:1)
  3 stones
(16, 3, D:1)
  3 stones
(16, 4, D:1)
  4 stones
(16, 5, D:1)
  2 stones
(16, 6, D:1)
  4 stones
(16, 7, D:1)
  a stone
(17, 1, D:1)
  a stone
(17, 3, D:1)
  3 stones
(17, 7, D:1)
  a stone
(18, 3, D:1)
  a stone
(18, 5, D:1)
  2 stones
(18, 6, D:1)
  2 stones
(19, 3, D:1)
  a stone
(19, 4, D:1)
  a stone
(19, 5, D:1)
  3 stones
(20, 4, D:1)
  2 stones
(20, 6, D:1)
  2 stones
(22, 11, D:1)
  a ball python skeleton
(22, 23, D:1)
  a ball python skeleton
(27, -9, D:1)
  a +0 ring mail
(29, 17, D:1)
  a +0 short sword
  a +0 whip
  a +0 club
(33, -4, D:1)
  a kobold skeleton
(39, 23, D:1)
  a ball python corpse (skeletalised by now)
(40, -2, D:1)
  a +0 ring mail
(41, -9, D:1)
  a hobgoblin skeleton

Level 2 of the Dungeon
(0, 0, D:2)
  a kobold corpse (skeletalised by now)
(3, 3, D:2)
  a +0 club
  a +0 club
  a +0 short sword
  a +0 whip
  a +0 short sword
(26, 11, D:2)
  a jackal skeleton
(42, 19, D:2)
  a +0 leather armour
(48, 8, D:2)
  a +0 scale mail

Level 3 of the Dungeon
(9, -1, D:3)
  a ball python skeleton
(11, 11, D:3)
  a +0 leather armour
(13, 21, D:3)
  an adder corpse (skeletalised by now)
(32, 2, D:3)
  a +0 dagger
(33, 0, D:3)
  3 boomerangs
(38, -1, D:3)
  5 stones
  a kobold skeleton
(40, 0, D:3)
  2 stones
(44, -4, D:3)
  3 stones
(48, -7, D:3)
  an adder skeleton
(51, -13, D:3)
  a +0 robe
(51, -5, D:3)
  a +0 ring mail
(51, 8, D:3)
  a +0 whip
  a +0 short sword
  a +0 short sword
  a +0 club
  a +0 dagger
  a +0 dagger
  a +0 dagger
  a scarf of harm
  a +0 robe
(57, 0, D:3)
  a rat corpse (skeletalised by now)

Level 4 of the Dungeon
(0, 0, D:4)
  a scroll of teleportation