Seven

Level 1 of the Dungeon
(0, 0, D:1)
  18 sling bullets
(13, 14, D:1)
  +0 swamp dragon scales
(19, 25, D:1)
  8 tomahawks of dispersal
(26, 2, D:1)
  a +0 spear
(29, -2, D:1)
  a +0 chain mail
(31, -2, D:1)
  a +0 club
(37, -2, D:1)
  19 arrows
(38, 31, D:1)
  a +0 whip
(44, -3, D:1)
  a +0 club
(44, 22, D:1)
  18 stones

Level 2 of the Dungeon
(0, 0, D:2)
  a +0 club
(2, 21, D:2)
  a bat corpse (skeletalised by now)
(6, -2, D:2)
  a +0 dagger
  3 stones
(11, 21, D:2)
  a +0 club
  5 stones
(16, 9, D:2)
  14 sling bullets
(16, 11, D:2)
  a +0 dagger
(21, 20, D:2)
  a +0 leather armour
(22, 8, D:2)
  a +0 dagger
(25, 7, D:2)
  a +0 helmet
(32, -10, D:2)
  a +0 dagger
(38, -4, D:2)
  17 bolts
(49, -9, D:2)
  a +0 ring mail

Level 3 of the Dungeon
(0, 0, D:3)
  a +0 dagger
(1, -4, D:3)
  an adder corpse
(4, -9, D:3)
  a scroll of identify
(5, -11, D:3)
  an uncursed ring of fire
(5, -9, D:3)
  19 gold pieces