Efficiency

Level 1 of the Dungeon
(0, 0, D:1)
  17 sling bullets
(2, 6, D:1)
  a hobgoblin corpse
(4, 1, D:1)
  a rat corpse
(4, 3, D:1)
  a quokka corpse
(4, 4, D:1)
  a +0 dagger
  5 stones
(4, 5, D:1)
  a hobgoblin corpse
(5, 1, D:1)
  a dart slug corpse
(5, 4, D:1)
  a rat corpse
(10, 23, D:1)
  12 gold pieces

Level 2 of the Dungeon
(0, 0, D:2)
  a +0 spear
(5, 5, D:2)
  a book of Minor Magic
(14, 6, D:2)
  a +0 ring mail

Level 4 of the Dungeon
(0, 0, D:4)
  a giant cockroach corpse
(0, 2, D:4)
  a +0 club (still there?)
  a goblin corpse (still there?)