Efficiency

Level 1 of the Dungeon
(0, 0, D:1)
  12 stones
(9, -3, D:1)
  20 stones

Level 2 of the Dungeon
(0, 0, D:2)
  6 gold pieces
(1, 11, D:2)
  a +0 club

Level 3 of the Dungeon
(0, 0, D:3)
  a cursed +0 war axe
(1, -2, D:3)
  20 bolts

Level 4 of the Dungeon
(0, 0, D:4)
  a +0 scale mail
(3, 17, D:4)
  an orc corpse
(5, -2, D:4)
  a +0 flail (still there?)
  an orc corpse (still there?)
(9, 26, D:4)
  a +0 tower shield