Efficiency

Level 1 of the Dungeon
(0, 0, D:1)
  a stone
(9, -7, D:1)
  16 bolts
(10, -7, D:1)
  a +0 club
  a goblin corpse
(23, 3, D:1)
  a bat corpse (skeletalised by now)
(42, 34, D:1)
  a +0 ring mail

Level 2 of the Dungeon
(0, 0, D:2)
  a stone (still there?)
  a +0 club (still there?)
(15, 7, D:2)
  8 gold pieces
(18, -9, D:2)
  a stone
(19, -9, D:2)
  a stone
(20, -7, D:2)
  a scroll of teleportation
(25, -3, D:2)
  2 stones
  a goblin corpse
(26, -3, D:2)
  2 stones
(27, -3, D:2)
  a stone