IndexError

Level 1 of the Dungeon
(0, 0, D:1)
  the Unrestrained Analects
(2, -3, D:1)
  a hobgoblin corpse
(2, 6, D:1)
  3 poisoned darts
(8, -1, D:1)
  a bat corpse
(17, -4, D:1)
  a +0 ring mail