20Natural

Level 1 of the Dungeon
(0, 0, D:1)
  a +6 ring of dexterity
(5, 6, D:1)
  a +0 sling
(7, -1, D:1)
  a scroll of teleportation
(11, 18, D:1)
  a +0 tower shield
(24, 7, D:1)
  a bat corpse
(46, 9, D:1)
  a frilled lizard corpse