behind

Level 1 of the Dungeon
(0, 0, D:1)
  a +0 dagger
(8, -13, D:1)
  a bat skeleton
(11, -1, D:1)
  a +0 ring mail
(20, 21, D:1)
  a bat skeleton
(27, 22, D:1)
  a +0 flail
(56, 15, D:1)
  a hobgoblin skeleton

Level 2 of the Dungeon
(0, 0, D:2)
  a quokka corpse (skeletalised by now)
(0, 22, D:2)
  a ball python skeleton
(9, 25, D:2)
  a +1 short sword of venom
  a stone
(10, 25, D:2)
  an adder corpse (skeletalised by now)
(11, 3, D:2)
  a +0 club
  a goblin skeleton
(13, 2, D:2)
  a +0 whip
  a kobold skeleton
(14, 34, D:2)
  a +0 club
(19, -5, D:2)
  a scarab talisman
(24, 11, D:2)
  a +0 whip
  5 stones
(30, 9, D:2)
  a bat skeleton
(33, 8, D:2)
  a +0 leather armour
(33, 33, D:2)
  a quokka skeleton
(34, 20, D:2)
  a +0 dagger
(40, 34, D:2)
  a +0 club
(46, 13, D:2)
  a ball python skeleton
(46, 30, D:2)
  a hobgoblin corpse (skeletalised by now)
(49, 41, D:2)
  a +0 dagger
  a goblin corpse (skeletalised by now)

Level 3 of the Dungeon
(4, -5, D:3)
  a parchment of Sigil of Binding
(6, -22, D:3)
  a +0 pair of boots
(7, -3, D:3)
  a ball python skeleton
(8, 11, D:3)
  a +0 dagger
(10, -16, D:3)
  a +0 dagger
  a goblin corpse
(11, 15, D:3)
  a quokka corpse (skeletalised by now)
(19, 8, D:3)
  a hobgoblin corpse
(21, -5, D:3)
  a +0 short sword of draining
  a ring of protection from cold
(23, -11, D:3)
  a ring of resist corrosion
(23, -8, D:3)
  a +0 leather armour
(30, -17, D:3)
  5 silver javelins
(52, -11, D:3)
  a +0 hand axe