Efficiency

Level 1 of the Dungeon
(8, -12, D:1)
  a dart slug corpse

Level 2 of the Dungeon
(0, 0, D:2)
  25 stones
(4, -3, D:2)
  a +0 ring mail

Level 3 of the Dungeon
(0, 0, D:3)
  a +0 club
(9, -6, D:3)
  5 gold pieces

Level 4 of the Dungeon
(0, 0, D:4)
  a +0 chain mail
(2, 3, D:4)
  a +0 dagger (still there?)
  a +0 leather armour (still there?)
(3, 3, D:4)
  a +0 club