Efficiency

Level 4 of the Dungeon
(0, 7, D:4)
  16 bolts
(14, -10, D:4)
  14 arrows
(16, -13, D:4)
  a +0 robe

Level 5 of the Dungeon
(0, 0, D:5)
  a scroll of teleportation
(12, 46, D:5)
  a staff of cold
(19, 42, D:5)
  a +0 club
  a goblin corpse

Level 6 of the Dungeon
(0, 0, D:6)
  12 gold pieces

the Ecumenical Temple