IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  a +0 ring mail
(2, -14, D:1)
  a rat skeleton
(4, -18, D:1)
  a ball python skeleton
(5, -18, D:1)
  a jackal skeleton
(8, -27, D:1)
  a +0 sling
(11, 22, D:1)
  a +0 leather armour
(12, 20, D:1)
  a rat corpse (skeletalised by now)
(17, -25, D:1)
  a hobgoblin skeleton
(17, 8, D:1)
  a +6 ring of dexterity
(18, -17, D:1)
  a beast talisman
(20, -15, D:1)
  a ball python skeleton
(21, 18, D:1)
  a +0 short sword
  4 stones
(22, -14, D:1)
  a bat skeleton
(24, -13, D:1)
  a +0 club
(24, -9, D:1)
  5 large rocks
(28, -17, D:1)
  a +0 ring mail
(28, 22, D:1)
  a +0 short sword
(29, -21, D:1)
  a +0 club
  a goblin skeleton
(29, -17, D:1)
  a +0 club
  a goblin skeleton
(35, 14, D:1)
  a +0 club
  a kobold skeleton
(38, 22, D:1)
  a jackal skeleton
(38, 23, D:1)
  a jackal skeleton
(40, 9, D:1)
  a +6 ring of intelligence
(41, 6, D:1)
  a +0 robe

Level 2 of the Dungeon
(0, 0, D:2)
  a rat corpse (skeletalised by now)
(1, -7, D:2)
  6 stones
(17, -10, D:2)
  2 stones
(19, 15, D:2)
  a ring of flight
(20, 10, D:2)
  4 darts of disjunction
(26, 4, D:2)
  a +0 robe
(27, 4, D:2)
  a +0 club
(27, 6, D:2)
  a +0 robe
(34, -9, D:2)
  a +0 ring mail
(36, 5, D:2)
  a ball python skeleton
  a hobgoblin skeleton
(39, 5, D:2)
  a ring of protection from fire {rF+, !d}
(39, 6, D:2)
  a +0 leather armour
(46, -13, D:2)
  a +0 scale mail
(50, 18, D:2)
  5 stones
  a +0 short sword
  a kobold skeleton

Level 3 of the Dungeon
(0, 0, D:3)
  a +0 club
  5 stones
(2, -2, D:3)
  a +0 leather armour
(5, 1, D:3)
  a scroll of identify
(7, -2, D:3)
  a +0 whip
  4 stones
  a kobold corpse (skeletalised by now)
(16, 19, D:3)
  a +0 robe
  a +0 dagger
(18, 18, D:3)
  a +0 giant club
(20, -9, D:3)
  a bat corpse
(20, 15, D:3)
  7 stones
(25, 12, D:3)
  a rat corpse
(25, 13, D:3)
  a bat corpse
(31, 13, D:3)
  a hobgoblin corpse
(33, 13, D:3)
  a +0 hand axe
(34, -3, D:3)
  a ribbon worm corpse
(34, -1, D:3)
  a ball python corpse
  a frilled lizard corpse

a sewer
(0, 0, Sewer)
  a +0 spear
(1, 1, Sewer)
  a potion of haste
(3, 2, Sewer)
  a potion of heal wounds