Nithhogg

Level 1 of the Dungeon
(0, 3, D:1)
  a staff of cold
(7, 9, D:1)
  5 stones
(7, 10, D:1)
  a +0 leather armour
(7, 22, D:1)
  a +1 short sword of freezing
(9, 34, D:1)
  a +0 robe of cold resistance
(24, -8, D:1)
  a +0 chain mail
(27, -2, D:1)
  a +0 short sword
  4 stones
(32, 10, D:1)
  a +0 whip
(34, -7, D:1)
  a +0 sling
(34, 0, D:1)
  4 stones
(34, 16, D:1)
  a +0 robe
(35, 26, D:1)
  a +0 short sword
(41, 11, D:1)
  a +0 club
(49, 22, D:1)
  a +0 mace
(51, 19, D:1)
  8 stones
(54, 14, D:1)
  a +0 dagger

Level 2 of the Dungeon
(0, 0, D:2)
  2 poisoned darts
(3, -35, D:2)
  5 stones
(10, -27, D:2)
  a +0 dagger
(12, -7, D:2)
  a +0 whip
(25, -13, D:2)
  a +0 short sword
(45, -28, D:2)
  a +0 short sword
  3 stones

Level 3 of the Dungeon
(0, 0, D:3)
  a scroll of identify

Level 5 of the Dungeon
(0, 0, D:5)
  a +0 club
  a +0 dagger
  a +0 club
  a +0 dagger
  a +0 chain mail
(0, 6, D:5)
  6 stones
(5, 14, D:5)
  6 stones
(9, 7, D:5)
  a scroll of blinking
(21, 15, D:5)
  a +0 robe
(28, -5, D:5)
  a +0 dagger
(33, -7, D:5)
  a +0 short sword
(34, -8, D:5)
  a +0 short sword
(34, -7, D:5)
  a +0 dagger
(34, -6, D:5)
  a +0 shortbow
(36, -7, D:5)
  a +0 club
(37, -8, D:5)
  8 stones
(41, 22, D:5)
  a +0 ring mail
(55, 5, D:5)
  8 stones

Level 6 of the Dungeon
(0, 0, D:6)
  a scroll of fog
(4, -2, D:6)
  a scroll of identify
(11, -12, D:6)
  a +0 ring mail