Note: Once you are in the dungeon, if you leave or die you will have to go through the entire series of clues again to obtain another Skipping Stone to return. You do not need another Contact Instructions but you do need to redo the clues starting at the bottle, sign, or book. You can also use the above to your advantage. Since each item turn-in (Drudge Charm, Green Phyntos Wasp Wing or Mud Golem Heart) nets you 1 million experience points, you can redo the clues repeatedly for numerous Skipping Stones and experience rewards (unknown expiration timer).