IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  4 stones
(1, -18, D:1)
  a bat corpse
(5, -7, D:1)
  a ball python corpse (skeletalised by now)
(11, -3, D:1)
  a -2 sling {Esteban}
(15, -11, D:1)
  a hobgoblin corpse (skeletalised by now)
(18, -29, D:1)
  a +0 spear
(20, -26, D:1)
  a +0 club
(22, -26, D:1)
  a +0 club
  a goblin skeleton
(25, 15, D:1)
  a stone
(35, -3, D:1)
  a bat skeleton
(35, 19, D:1)
  a +0 falchion
(40, -18, D:1)
  a +0 ring mail
(41, -1, D:1)
  a +0 ring mail
(44, -10, D:1)
  a rat skeleton
(45, -12, D:1)
  a jackal skeleton
(47, -14, D:1)
  a +0 robe

Level 2 of the Dungeon
(0, 0, D:2)
  an adder corpse
(47, 2, D:2)
  a giant cockroach corpse