Efficiency

Level 1 of the Dungeon
(0, 0, D:1)
  a +0 robe

Level 2 of the Dungeon
(0, 0, D:2)
  a rat corpse
(1, 0, D:2)
  a hobgoblin corpse
(13, -43, D:2)
  a rat corpse
(14, -49, D:2)
  23 sling bullets
(14, -47, D:2)
  2 stones
(21, -47, D:2)
  a stone

Level 3 of the Dungeon
(0, 0, D:3)
  a +0 scale mail
(10, 2, D:3)
  a +0 leather armour
(11, 10, D:3)
  6 stones
(12, 9, D:3)
  11 gold pieces