Impervious

Level 1 of the Dungeon
(0, 0, D:1)
  a mace
(6, 7, D:1)
  a +0 dagger
(7, 32, D:1)
  a +0 club
(10, 5, D:1)
  a ring mail
(17, 5, D:1)
  a +0 club
(20, 23, D:1)
  19 stones
(25, 30, D:1)
  18 bolts
(29, 39, D:1)
  15 stones
(35, 12, D:1)
  a runed short sword
(35, 44, D:1)
  a bat skeleton
(43, 1, D:1)
  17 stones
(60, 16, D:1)
  a short sword

Level 2 of the Dungeon
(0, 0, D:2)
  a frilled lizard skeleton
(2, 51, D:2)
  a +0 club
(4, 11, D:2)
  a naga barding
(11, 1, D:2)
  a stone
(12, 1, D:2)
  a stone
(13, 2, D:2)
  a stone
(15, 4, D:2)
  a +0 short sword
(19, -1, D:2)
  a quokka corpse
  a giant cockroach corpse
(20, -1, D:2)
  a rat skeleton
(21, 2, D:2)
  an adder skeleton
(25, 1, D:2)
  18 stones
(46, 9, D:2)
  a glowing spear

Level 3 of the Dungeon
(0, 0, D:3)
  27 bolts