Efficiency

Level 4 of the Dungeon
(0, 0, D:4)
  15 arrows
(3, -5, D:4)
  a +0 ring mail
(5, -16, D:4)
  20 sling bullets
(6, 22, D:4)
  11 stones
(7, -20, D:4)
  20 stones

Level 5 of the Dungeon
(0, 1, D:5)
  a +0 giant club (still there?)
  a +0 giant club (still there?)
  a two-headed ogre corpse (skeletalised by now) (still there?)
(1, -2, D:5)
  a potion of flight
(1, -1, D:5)
  a book of Maledictions
(1, 0, D:5)
  a +0 giant club (still there?)
  an ogre corpse (skeletalised by now) (still there?)
(3, -15, D:5)
  14 bolts
(7, -3, D:5)
  a leopard gecko corpse (skeletalised by now)
(7, 0, D:5)
  18 arrows
(9, -9, D:5)
  22 stones
(43, -1, D:5)
  a +0 giant club
  a +0 club
  a +0 scythe
  a +1 robe of magic resistance
(44, -1, D:5)
  a +0 shortbow
  15 arrows
(45, 0, D:5)
  an arrow
  (unseen)
(46, -1, D:5)
  an arrow

Level 7 of the Dungeon
(0, 0, D:7)
  19 sling bullets
(4, -3, D:7)
  a +1 whip of flaming
  a +0 robe
(9, -18, D:7)
  3 gold pieces
(10, 24, D:7)
  a +0 dagger (still there?)
  a +0 robe (still there?)
  an orc corpse (still there?)
(11, 28, D:7)
  a +0 hand axe
  5 boomerangs
(12, 26, D:7)
  a +0 ring mail
  a +0 halberd
  4 boomerangs of dispersal
(13, 26, D:7)
  a +0 whip
(18, -20, D:7)
  a +0 mace
(23, -20, D:7)
  a quokka corpse

Level 8 of the Dungeon
(0, 0, D:8)
  a potion of degeneration
(18, 16, D:8)
  a scroll of identify