Efficiency

Level 4 of the Dungeon
(0, 0, D:4)
  7 gold pieces
(2, 3, D:4)
  a +0 flail

Level 5 of the Dungeon
(0, 0, D:5)
  a staff of fire
(4, -31, D:5)
  13 gold pieces
(8, -24, D:5)
  a +0 leather armour
(9, -7, D:5)
  a hound corpse

Level 6 of the Dungeon
(0, 0, D:6)
  14 bolts
(7, 2, D:6)
  a +0 ring mail
(12, 0, D:6)
  a +0 whip
(52, -25, D:6)
  a scroll of fear