Undo

Level 1 of the Dungeon
(4, -1, D:1)
  a +0 ring mail
(8, 6, D:1)
  a frilled lizard corpse (skeletalised by now)
(9, 6, D:1)
  a +0 club
  a goblin corpse (skeletalised by now)
(11, -7, D:1)
  a frilled lizard corpse (skeletalised by now)
(11, 6, D:1)
  a ball python skeleton
(15, 10, D:1)
  a +0 spear
  a gnoll skeleton
(21, -5, D:1)
  a +0 short sword
  a kobold skeleton
(26, 9, D:1)
  a +0 club
  a kobold skeleton
(27, 6, D:1)
  a +0 short sword
  a kobold skeleton
(29, 21, D:1)
  a +0 dagger
(38, 23, D:1)
  a +0 club
  a gnoll skeleton
(39, 18, D:1)
  a bat skeleton
(43, 17, D:1)
  a quokka corpse (skeletalised by now)
(44, -1, D:1)
  a rat corpse (skeletalised by now)
(47, 9, D:1)
  a bat corpse (skeletalised by now)

Level 2 of the Dungeon
(0, 0, D:2)
  a +0 ring mail
(0, 22, D:2)
  a +0 club
(3, 10, D:2)
  a quokka corpse (skeletalised by now)
(7, 2, D:2)
  a +0 club
  a goblin corpse (skeletalised by now)
(10, 11, D:2)
  a frilled lizard corpse (skeletalised by now)
(18, 19, D:2)
  a frilled lizard skeleton
(21, -2, D:2)
  a +0 sling
(21, 20, D:2)
  a bat skeleton
(31, 28, D:2)
  a bat skeleton
(33, 10, D:2)
  a +0 dagger
(33, 17, D:2)
  a bat corpse (skeletalised by now)
(36, 16, D:2)
  a bat corpse (skeletalised by now)
(42, 29, D:2)
  a jackal corpse (skeletalised by now)

Level 3 of the Dungeon
(0, 0, D:3)
  2 javelins
(2, 0, D:3)
  a +0 whip
  a +0 scale mail
(4, 0, D:3)
  a rat corpse
(6, 0, D:3)
  a +0 club
(9, -8, D:3)
  a +0 robe
(19, -5, D:3)
  a +0 hand axe
  a +0 pair of boots
  a +0 mace
  a +0 sling
  a +0 ring mail
  an orc corpse
  an orc corpse
(20, -5, D:3)
  a +0 flail
  a +0 dagger
  a +0 leather armour
  an orc corpse
  an orc corpse
(22, -8, D:3)
  a +0 dagger
  a hobgoblin skeleton
(30, -9, D:3)
  a +0 trident
  an orc corpse (skeletalised by now)
(31, -20, D:3)
  a +0 dagger
(36, -1, D:3)
  a bat corpse
(37, 1, D:3)
  a clockroach corpse
(37, 2, D:3)
  a +0 whip