IndexError

Level 1 of the Dungeon
(1, -8, D:1)
  a +0 dagger
(1, 10, D:1)
  a +0 dagger
(3, 2, D:1)
  a +0 ring mail
(5, -17, D:1)
  a +0 dagger
(9, -14, D:1)
  a +0 dagger
(16, -21, D:1)
  a +0 short sword
(22, -18, D:1)
  a +0 spear
(22, 14, D:1)
  4 stones
(23, -1, D:1)
  a +0 dagger
(25, 12, D:1)
  a +0 spear
(28, -7, D:1)
  4 stones
  a +0 short sword
(32, 5, D:1)
  a +0 dagger
(37, 1, D:1)
  a +0 spear
(38, -20, D:1)
  a +0 club
(38, 15, D:1)
  4 stones
(40, -22, D:1)
  3 stones
  a +4 short sword
(42, -5, D:1)
  9 stones
(43, 13, D:1)
  a +0 dagger

Level 2 of the Dungeon
(0, 0, D:2)
  2 stones
  a +0 dagger
(0, 3, D:2)
  a +0 club
(0, 20, D:2)
  a +0 spear
(15, 16, D:2)
  a +0 trident
(20, 16, D:2)
  a +0 club
  5 stones
(31, 16, D:2)
  a +0 club
(38, 3, D:2)
  a +0 dagger
(39, 19, D:2)
  a +0 dagger

Level 3 of the Dungeon
(0, 0, D:3)
  a +0 ring mail
(8, -33, D:3)
  a +0 dagger
(30, -18, D:3)
  a +0 dagger
(32, -24, D:3)
  a +0 robe
(33, -15, D:3)
  a +0 hand axe
(33, -13, D:3)
  a +0 falchion
(35, -15, D:3)
  a +0 spear
(35, -13, D:3)
  a +0 mace
(41, -2, D:3)
  a quokka corpse (skeletalised by now)
(43, -23, D:3)
  a +0 club
(44, -41, D:3)
  a +0 plate armour
(46, -24, D:3)
  a +0 short sword
(50, -18, D:3)
  a +0 hand axe

Level 4 of the Dungeon
(7, 1, D:4)
  a +0 trident
(7, 11, D:4)
  an adder corpse
(12, -14, D:4)
  a +0 ring mail
(17, -8, D:4)
  an adder corpse
(21, 13, D:4)
  11 gold pieces
(21, 17, D:4)
  a +0 spear
(23, 18, D:4)
  a +0 ring mail
(25, 13, D:4)
  a +0 morningstar
(27, 10, D:4)
  a +0 leather armour
(27, 13, D:4)
  a potion of curing