Efficiency

Level 1 of the Dungeon
(0, 0, D:1)
  a potion of resistance
(6, 9, D:1)
  17 gold pieces
(11, 10, D:1)
  a hobgoblin corpse
(11, 13, D:1)
  a +0 hand axe

Level 3 of the Dungeon
(0, 0, D:3)
  a rat corpse

Level 4 of the Dungeon
(0, 0, D:4)
  a +0 short sword
  3 stones
(7, -2, D:4)
  a +0 ring mail
(12, -9, D:4)
  6 large rocks