IndexError

Level 1 of the Dungeon
(5, 16, D:1)
  a jackal skeleton
(5, 17, D:1)
  a bat skeleton
(6, 29, D:1)
  a +0 leather armour
(15, 30, D:1)
  a +0 short sword
  a kobold corpse (skeletalised by now)
(18, 25, D:1)
  a bat skeleton
(21, 25, D:1)
  4 poisoned darts
(25, 24, D:1)
  a ball python skeleton
(29, 7, D:1)
  a +0 club
  a goblin skeleton
(29, 33, D:1)
  a hobgoblin corpse (skeletalised by now)
(33, 44, D:1)
  a +0 short sword
  5 stones
  a kobold corpse (skeletalised by now)
(34, 42, D:1)
  a jackal corpse (skeletalised by now)
(39, 7, D:1)
  a +0 hand axe
(40, 8, D:1)
  a bat skeleton
(42, 10, D:1)
  a +0 club
(43, 11, D:1)
  a +0 club
  a goblin skeleton
(47, 20, D:1)
  a ball python skeleton
(52, -2, D:1)
  a +0 short sword
  a kobold corpse (skeletalised by now)
(53, 45, D:1)
  a +0 club
(53, 47, D:1)
  a +0 club
(54, 42, D:1)
  a frilled lizard corpse (skeletalised by now)
(54, 45, D:1)
  a quokka corpse (skeletalised by now)
(54, 46, D:1)
  6 poisoned darts

Level 2 of the Dungeon
(0, 0, D:2)
  a hobgoblin corpse (skeletalised by now)
(2, 9, D:2)
  a +0 club
(2, 28, D:2)
  a +0 ring mail
(3, 45, D:2)
  a +0 club
  a goblin corpse (skeletalised by now)
(7, 26, D:2)
  an adder skeleton
(14, 22, D:2)
  a hobgoblin skeleton
(23, 4, D:2)
  5 poisoned darts
(34, 8, D:2)
  a +0 robe
(35, 13, D:2)
  a rat skeleton
(36, 6, D:2)
  a ball python skeleton
(37, 50, D:2)
  a +0 dagger
  a goblin corpse (skeletalised by now)
(40, 25, D:2)
  a +0 leather armour
(41, 2, D:2)
  a +0 club
(52, 9, D:2)
  the +1 Delatra's gloves {ID++}
    ID++:       It heals its wearer when they drink unknown potions, and
    restores their MP when they read unknown scrolls.

Level 3 of the Dungeon
(11, 34, D:3)
  a +0 club
  a +0 sling
  a goblin corpse
(11, 38, D:3)
  a +0 pair of gloves
(16, 44, D:3)
  a dart slug corpse
(32, 6, D:3)
  a +0 dagger
  4 stones
(55, 36, D:3)
  a +0 helmet

Level 4 of the Dungeon
(4, -6, D:4)
  a +0 club
(5, -8, D:4)
  12 gold pieces
(5, -2, D:4)
  a +0 pair of boots