Efficiency

Level 1 of the Dungeon
(0, 0, D:1)
  a frilled lizard corpse
(6, 6, D:1)
  a hobgoblin corpse
(7, 3, D:1)
  a frilled lizard corpse

Level 2 of the Dungeon
(0, 0, D:2)
  a +0 ring mail
(0, 3, D:2)
  16 stones
(2, 1, D:2)
  24 stones
(13, 3, D:2)
  a +0 mace
(13, 14, D:2)
  12 gold pieces
(14, 18, D:2)
  a +0 hand axe
(20, 4, D:2)
  a +0 battleaxe
(24, 8, D:2)
  a bat corpse

Level 3 of the Dungeon
(0, 0, D:3)
  a +0 falchion
(21, -8, D:3)
  an uncursed staff of earth {!a}
(22, -8, D:3)
  a poisoned dart
(24, -11, D:3)
  2 boomerangs
(24, -9, D:3)
  a goblin corpse
(24, -8, D:3)
  a poisoned dart