Efficiency

Level 3 of the Dungeon
(0, 0, D:3)
  a bat corpse (skeletalised by now)

Level 4 of the Dungeon
(0, 0, D:4)
  12 bolts
(1, 1, D:4)
  10 gold pieces
(1, 2, D:4)
  19 arrows
(14, 13, D:4)
  a +0 ring mail
  a +0 club
  a +0 mace
  a cursed +0 robe
  a +0 dagger
  an orc corpse
  an orc corpse
(21, 12, D:4)
  a jackal corpse
(32, 4, D:4)
  11 stones
(37, 13, D:4)
  an adder corpse (skeletalised by now)
(46, 25, D:4)
  a potion of heal wounds

Level 5 of the Dungeon
(0, 0, D:5)
  an arrow