Efficiency

Level 1 of the Dungeon
(0, 0, D:1)
  14 gold pieces
(4, 9, D:1)
  a kobold corpse (skeletalised by now)
(5, 15, D:1)
  a +0 leather armour
(10, 15, D:1)
  19 stones

Level 2 of the Dungeon
(0, 0, D:2)
  a frilled lizard corpse (skeletalised by now)
(4, 7, D:2)
  a leopard gecko corpse (skeletalised by now)

Level 3 of the Dungeon
(0, 0, D:3)
  9 gold pieces
(4, -5, D:3)
  a hobgoblin corpse
(10, -10, D:3)
  an orc corpse
(13, 3, D:3)
  a +0 hand axe
(45, 3, D:3)
  a +0 whip

Level 4 of the Dungeon
(0, 0, D:4)
  7 datura-tipped darts
(6, -1, D:4)
  10 gold pieces
(7, 0, D:4)
  a potion of haste
(9, 0, D:4)
  a +0 pair of gloves
(20, 7, D:4)
  8 gold pieces
(20, 13, D:4)
  a scroll of immolation
(22, 13, D:4)
  an uncursed ring of fire
(26, 10, D:4)
  13 gold pieces (still there?)
  a +0 leather armour (still there?)
  a cursed -2 club (still there?)
(26, 20, D:4)
  a quokka corpse
(27, 10, D:4)
  a +0 whip (still there?)
  a +0 scale mail (still there?)
  an orc corpse (still there?)
(27, 11, D:4)
  a +0 short sword
(28, 3, D:4)
  12 stones
(47, 23, D:4)
  a +0 mace