IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  a ball python corpse (skeletalised by now)
(8, 25, D:1)
  a +0 chain mail
(9, 27, D:1)
  a +0 dagger
(19, 23, D:1)
  a stone
(19, 29, D:1)
  a hobgoblin corpse (skeletalised by now)
(20, -3, D:1)
  a hobgoblin corpse (skeletalised by now)
  a jackal corpse (skeletalised by now)
  a jackal corpse (skeletalised by now)
(32, 3, D:1)
  5 stones
  a +0 spear
  a kobold skeleton
(34, 15, D:1)
  a +0 leather armour
(36, -14, D:1)
  a hobgoblin skeleton
(36, -3, D:1)
  a ball python skeleton
(37, -12, D:1)
  a +0 dagger
(38, -6, D:1)
  a bat skeleton
(44, 5, D:1)
  a rat skeleton
(51, 11, D:1)
  a +0 club
(53, 2, D:1)
  5 stones

Level 2 of the Dungeon
(0, 0, D:2)
  a +0 quarterstaff
(7, -4, D:2)
  a +0 robe
(25, 14, D:2)
  a +0 spear
(26, 14, D:2)
  a +0 scale mail
  a +0 flail
  the human skeleton of Terence
(32, -3, D:2)
  a +0 dagger
(34, -3, D:2)
  6 stones
(40, 10, D:2)
  a hobgoblin corpse (skeletalised by now)
(61, 0, D:2)
  a +0 scale mail

Level 3 of the Dungeon
(0, 0, D:3)
  a +0 chain mail
(6, -17, D:3)
  a +0 ring mail
(7, -11, D:3)
  a +0 spear
(7, 14, D:3)
  a +0 robe
(9, -13, D:3)
  a +0 chain mail
(9, -1, D:3)
  a +0 leather armour
(13, -3, D:3)
  a +0 dagger
  3 stones
(15, 0, D:3)
  a quokka corpse (skeletalised by now)
(20, 17, D:3)
  a +0 chain mail
(25, -10, D:3)
  a rat corpse (skeletalised by now)
(28, 0, D:3)
  a +0 dagger
  3 stones
  a kobold corpse (skeletalised by now)
(34, 26, D:3)
  a +0 dagger
(45, 29, D:3)
  a +0 ring mail

Level 4 of the Dungeon
(0, 0, D:4)
  a +0 short sword
(3, 0, D:4)
  a giant cockroach corpse
(5, 5, D:4)
  a +0 dagger of holy wrath (still there?)
  a +0 robe (still there?)
(6, 0, D:4)
  a +0 short sword
  2 stones
(6, 16, D:4)
  a hound skeleton
(12, 19, D:4)
  an iguana corpse