Efficiency

Level 1 of the Dungeon
(0, 0, D:1)
  a +0 hand axe
(25, -12, D:1)
  3 gold pieces

Level 2 of the Dungeon
(0, 0, D:2)
  7 arrows
(3, -9, D:2)
  a quokka corpse (skeletalised by now)
(5, 37, D:2)
  an adder corpse (skeletalised by now)
(7, 33, D:2)
  15 bolts
(29, 4, D:2)
  a potion of resistance
(31, 0, D:2)
  a scroll of identify
(33, -1, D:2)
  3 scrolls of identify

Level 3 of the Dungeon
(0, 0, D:3)
  a +0 robe
(4, 3, D:3)
  17 stones
(5, -4, D:3)
  a +0 whip
(10, -10, D:3)
  a hobgoblin corpse (skeletalised by now)
(12, -6, D:3)
  a bat corpse (skeletalised by now)

Level 4 of the Dungeon
(0, 0, D:4)
  29 stones
(3, -7, D:4)
  a +0 club
(5, -7, D:4)
  a +0 dire flail (still there?)
  a +0 robe (still there?)
  the orc corpse of Blork the orc (skeletalised by now) (still there?)
(14, 0, D:4)
  a +0 ring mail
(15, 0, D:4)
  18 stones
(15, 14, D:4)
  11 gold pieces
(16, 25, D:4)
  12 gold pieces
(22, 28, D:4)
  4 gold pieces

Level 5 of the Dungeon
(0, 0, D:5)
  a +0 robe
(3, 0, D:5)
  an arrow
(4, 1, D:5)
  15 arrows
  a +0 shortbow
  a centaur corpse
(6, 1, D:5)
  an arrow
(7, 1, D:5)
  an arrow
(7, 7, D:5)
  a +0 whip (still there?)
  a +0 dagger (still there?)
  a +0 hand axe (still there?)
(7, 9, D:5)
  a +0 giant club
  an ogre corpse
  an adder corpse
(19, 9, D:5)
  a wand of random effects (15)
(21, 9, D:5)
  a leopard gecko corpse
(28, 20, D:5)
  a potion of degeneration