IndexError

Level 1 of the Dungeon
(1, -3, D:1)
  a +0 dagger
(2, -14, D:1)
  a +0 plate armour
(8, -12, D:1)
  a +0 scale mail
(9, 1, D:1)
  a +0 ring mail
(10, -11, D:1)
  a hobgoblin corpse (skeletalised by now)
(12, -26, D:1)
  a +0 club
  a goblin skeleton
(14, -26, D:1)
  a +0 dagger
  a goblin skeleton
(17, 3, D:1)
  a +4 ring of protection
(19, -19, D:1)
  a +0 dagger
(23, 5, D:1)
  a +0 club
(31, -17, D:1)
  a +0 club
  a kobold corpse (skeletalised by now)
(31, 7, D:1)
  a frilled lizard corpse (skeletalised by now)
(36, -13, D:1)
  a -2 sling {Santos}
(39, -24, D:1)
  a rat corpse (skeletalised by now)
(42, -14, D:1)
  a +0 robe
(47, -8, D:1)
  a +0 dagger
(54, -8, D:1)
  a bat corpse (skeletalised by now)
(55, -22, D:1)
  a +0 robe
(57, -10, D:1)
  a +0 scale mail

Level 2 of the Dungeon
(0, 0, D:2)
  a +0 falchion
(7, 5, D:2)
  a +0 club
(16, -15, D:2)
  a +0 dagger
  a stone
(20, -22, D:2)
  5 stones
(24, 22, D:2)
  a quokka skeleton
(25, 9, D:2)
  a hobgoblin skeleton
(43, 10, D:2)
  a +0 leather armour
(46, 12, D:2)
  a frilled lizard skeleton
(47, 0, D:2)
  a +0 hammer
(47, 10, D:2)
  7 stones
(49, 1, D:2)
  a +0 hammer
(50, -11, D:2)
  a +0 hammer
(54, 7, D:2)
  a bat skeleton

Level 3 of the Dungeon
(0, 0, D:3)
  a +0 club
  an orc skeleton
(6, 6, D:3)
  a +0 ring mail
(8, 24, D:3)
  a black bear corpse (skeletalised by now)
(9, 23, D:3)
  3 stones
  an adder corpse (skeletalised by now)
(11, 1, D:3)
  a +0 club
(18, 5, D:3)
  a +0 halberd
(20, 31, D:3)
  a +0 robe
(27, 2, D:3)
  5 stones
(29, 40, D:3)
  an amulet of magic regeneration
(31, 12, D:3)
  a +0 dagger
(39, 33, D:3)
  a +0 robe
  a +0 dagger
(40, 15, D:3)
  a +0 spear
(49, -1, D:3)
  a +0 ring mail
(52, 18, D:3)
  an amulet of magic regeneration
(52, 32, D:3)
  a +0 whip
  a kobold corpse (skeletalised by now)
(54, 21, D:3)
  a rat skeleton

Level 4 of the Dungeon
(0, 0, D:4)
  a bullfrog corpse
(7, 18, D:4)
  a quokka corpse (skeletalised by now)
(9, -6, D:4)
  6 stones
(11, 11, D:4)
  a ring of resist corrosion
(13, 20, D:4)
  a ring of protection from fire
(20, -11, D:4)
  8 stones
(20, 25, D:4)
  a +0 ring mail
(21, 23, D:4)
  6 poisoned darts
  a +0 whip
(24, 8, D:4)
  a +0 spear
(25, 26, D:4)
  a +0 dagger
(25, 27, D:4)
  a +0 robe
(26, 0, D:4)
  a +0 rapier
  a +0 leather armour
(28, 26, D:4)
  5 stones
(30, 19, D:4)
  13 gold pieces
(31, 19, D:4)
  a throwing net
(35, 4, D:4)
  a hobgoblin corpse (skeletalised by now)
(36, 26, D:4)
  a +0 hand axe
(42, 6, D:4)
  a +0 club
(45, 8, D:4)
  4 stones
(49, 1, D:4)
  a +0 flail
  an orc corpse (skeletalised by now)
(49, 6, D:4)
  a +0 short sword
(49, 11, D:4)
  a +0 plate armour