Efficiency

Level 2 of the Dungeon
(0, 0, D:2)
  4 large rocks
(10, 14, D:2)
  25 stones
(17, 2, D:2)
  a +0 club
(18, -12, D:2)
  a +0 hunting sling
(18, -10, D:2)
  a stone
(18, 1, D:2)
  a +0 club
(20, -11, D:2)
  2 stones

Level 3 of the Dungeon
(0, 0, D:3)
  a +0 flail
  a +0 leather armour
  a +0 trident
  23 stones
  a +0 club
  a +0 hunting sling
(1, 2, D:3)
  a stone
(1, 5, D:3)
  a +0 robe (still there?)
  a +0 dagger (still there?)
(2, 5, D:3)
  a kobold corpse (skeletalised by now)
(3, 7, D:3)
  a +0 dagger (still there?)
  a +0 leather armour (still there?)
(3, 8, D:3)
  a +0 leather armour (still there?)
  a +0 hand axe (still there?)
(9, 14, D:3)
  14 gold pieces
(13, 0, D:3)
  a +0 club
(17, 5, D:3)
  a +0 club
(19, 5, D:3)
  a +0 spear
  (unseen)
(19, 24, D:3)
  a +0 hand axe
(20, 26, D:3)
  a +0 trident
(23, 26, D:3)
  a +0 club
(23, 27, D:3)
  a +0 club
  (unseen)
(24, 15, D:3)
  17 stones

Level 4 of the Dungeon
(0, 0, D:4)
  a stone
(0, 8, D:4)
  a +0 short sword (still there?)
  a stone (still there?)
  a kobold corpse (still there?)
(10, 2, D:4)
  9 gold pieces
(11, 9, D:4)
  an adder skeleton
(12, 4, D:4)
  15 gold pieces
(12, 23, D:4)
  a +0 leather armour (still there?)
  a +0 flail (still there?)
  an orc corpse (still there?)
(12, 24, D:4)
  a +0 leather armour
  a +0 dagger
  an orc corpse
(12, 27, D:4)
  13 gold pieces
(13, 22, D:4)
  a +0 trident (still there?)
  a +0 leather armour (still there?)
  a +0 club (still there?)
  an orc skeleton (still there?)
(15, 22, D:4)
  a scorpion corpse
(16, 22, D:4)
  a cursed -2 falchion
  a +0 leather armour
  a +0 hand axe
  an orc skeleton
(17, 21, D:4)
  a +0 leather armour
  a +0 club
  an orc skeleton
(21, 12, D:4)
  a +0 short sword
(25, 38, D:4)
  a +0 leather armour
(26, 32, D:4)
  a cursed -1 hunting sling