Undo

Level 1 of the Dungeon
(0, 0, D:1)
  a ball python corpse (skeletalised by now)
(0, 1, D:1)
  a ball python corpse (skeletalised by now)
(3, 2, D:1)
  a +0 whip
(3, 45, D:1)
  a +0 sling
(11, 42, D:1)
  a +0 sling
(12, 1, D:1)
  a +0 dagger
(16, 1, D:1)
  a ball python corpse (skeletalised by now)
(23, 44, D:1)
  a +0 dagger
  a goblin skeleton
(36, 5, D:1)
  a +0 short sword of freezing (still there?)
  3 stones (still there?)
(45, -7, D:1)
  a frilled lizard corpse (skeletalised by now)

Level 2 of the Dungeon
(0, 0, D:2)
  a hobgoblin corpse (skeletalised by now)
(0, 1, D:2)
  the felid corpse of Natasha (skeletalised by now)
(15, -21, D:2)
  a bat corpse
(18, -3, D:2)
  a +0 ring mail
(20, -14, D:2)
  a +0 leather armour
(21, -28, D:2)
  a ribbon worm corpse
(25, 4, D:2)
  a jackal corpse (skeletalised by now)
(29, -8, D:2)
  a +0 ring mail
(54, -24, D:2)
  2 poisoned darts
(55, -23, D:2)
  a poisoned dart

Level 3 of the Dungeon
(8, 11, D:3)
  a +0 club
(10, 3, D:3)
  10 gold pieces
(16, 15, D:3)
  a bat corpse (skeletalised by now)
(27, 31, D:3)
  a bat corpse (skeletalised by now)
(30, 21, D:3)
  a ball python corpse (skeletalised by now)

Level 4 of the Dungeon
(0, 0, D:4)
  a +0 trident
(0, 1, D:4)
  a +0 club
(0, 2, D:4)
  a ball python corpse (skeletalised by now)
(1, 2, D:4)
  a +0 short sword
  a +0 whip
  a +0 leather armour
(8, -2, D:4)
  a howler monkey corpse (skeletalised by now)
(12, -13, D:4)
  a quokka corpse (skeletalised by now)
(13, -9, D:4)
  9 gold pieces
(13, -7, D:4)
  an atropa-tipped dart