Riddle

Level 5 of the Dungeon
[Shop] Usiuxobb's Book Shoppe
  (Shop contents are unknown)
(0, 0, D:5)
  8 gold pieces
(0, 2, D:5)
  8 gold pieces
(2, -3, D:5)
  a +0 mace
(4, -18, D:5)
  10 arrows
(5, -3, D:5)
  28 stones

Level 6 of the Dungeon
(0, 0, D:6)
  15 gold pieces
(3, 1, D:6)
  an adder corpse
(4, 15, D:6)
  9 poisoned darts
(6, 12, D:6)
  a potion of curing
(6, 17, D:6)
  8 datura-tipped darts
(13, -2, D:6)
  a scroll of acquirement