Efficiency

Level 1 of the Dungeon
(1, 24, D:1)
  20 sling bullets
(1, 28, D:1)
  5 gold pieces
(6, 3, D:1)
  a frilled lizard corpse (skeletalised by now)
(6, 5, D:1)
  9 arrows

Level 2 of the Dungeon
(0, 0, D:2)
  7 gold pieces
(13, 2, D:2)
  a goblin corpse (skeletalised by now)

Level 3 of the Dungeon
(0, 0, D:3)
  a giant cockroach corpse
(33, 11, D:3)
  a +0 club (still there?)
  a kobold corpse (still there?)
(37, 8, D:3)
  a bat corpse

Level 4 of the Dungeon
(0, 0, D:4)
  6 gold pieces
(2, -1, D:4)
  a cursed +0 plate armour
(4, 4, D:4)
  a +0 club
  a +0 leather armour
  an orc corpse
(5, 4, D:4)
  a stone

Level 5 of the Dungeon
(0, 0, D:5)
  a stone
(1, -1, D:5)
  a +0 chain mail
(2, -9, D:5)
  a +0 leather armour
(8, 2, D:5)
  a scroll of blinking

Level 6 of the Dungeon
(0, 0, D:6)
  3 scrolls of identify