Efficiency

Level 1 of the Dungeon
(0, 0, D:1)
  a +0 hunting sling
(23, 48, D:1)
  a frilled lizard corpse (skeletalised by now)
(24, 47, D:1)
  a +0 club
(37, 9, D:1)
  a book of Misfortune

Level 2 of the Dungeon
(0, 0, D:2)
  a bat corpse (skeletalised by now)
(1, 3, D:2)
  18 gold pieces

Level 3 of the Dungeon
(0, 0, D:3)
  a ball python corpse (skeletalised by now)
(0, 1, D:3)
  a +0 short sword
(2, 11, D:3)
  a +0 falchion (still there?)
  a +0 leather armour (still there?)
(8, 16, D:3)
  an adder corpse (skeletalised by now)
(8, 17, D:3)
  a hobgoblin corpse (skeletalised by now)
(31, 5, D:3)
  a +0 trident
  a +0 short sword
  a ball python corpse (skeletalised by now)
  an orc corpse (skeletalised by now)
(31, 6, D:3)
  a +0 dagger (still there?)
  a +0 robe (still there?)
(33, 0, D:3)
  22 arrows
(33, 3, D:3)
  a +0 hand axe
  a +0 falchion
  an orc corpse (skeletalised by now)
(43, 12, D:3)
  a +0 halberd

Level 4 of the Dungeon
(0, 0, D:4)
  12 gold pieces
(6, 21, D:4)
  a book of Decay
(12, 0, D:4)
  a giant cockroach corpse
(12, 14, D:4)
  a +0 dagger (still there?)
  a kobold corpse (skeletalised by now) (still there?)
(14, 15, D:4)
  a +0 giant club
(15, 2, D:4)
  a +0 club
(18, 2, D:4)
  a +0 club
(20, 5, D:4)
  a +1 mace of holy wrath (still there?)
  an orc corpse (still there?)
(22, 6, D:4)
  a +0 glaive
  a +0 chain mail
  a +0 mace
  a +0 chain mail
  an orc corpse
  an orc corpse
(26, 34, D:4)
  a +0 club
(36, 24, D:4)
  8 sling bullets
(44, 28, D:4)
  a +0 ring mail
(51, 33, D:4)
  a +0 dagger

Level 5 of the Dungeon
(0, 0, D:5)
  a scroll of identify
(3, -8, D:5)
  2 potions of flight