Efficiency

Level 1 of the Dungeon
(0, 0, D:1)
  13 gold pieces
(9, 3, D:1)
  9 gold pieces

Level 2 of the Dungeon
(0, 0, D:2)
  13 stones
(4, 12, D:2)
  a kobold corpse
(6, -4, D:2)
  an adder corpse

Level 3 of the Dungeon
(0, 0, D:3)
  a +0 club (still there?)
  a goblin corpse (still there?)
(0, 2, D:3)
  an adder corpse
(1, -1, D:3)
  a frilled lizard corpse
(2, -1, D:3)
  a giant cockroach corpse
(6, -11, D:3)
  18 stones
(8, -1, D:3)
  a +0 dagger (still there?)
  12 gold pieces (still there?)
(10, 4, D:3)
  a scroll of fear (still there?)
  24 bolts (still there?)
(12, -1, D:3)
  a +0 club
(13, -1, D:3)
  a hobgoblin corpse
(14, -5, D:3)
  a scroll of identify
(14, -3, D:3)
  a +0 whip
(15, -17, D:3)
  13 gold pieces
(16, -3, D:3)
  18 gold pieces