Pirate Black Jack: I went out & buried some of my treasures. When you find a Black Jack's Treasure Hunt Packet or Packets,(Like in above picture) all buried 3-4" deep, you should be close to a Cashe! Cashes are only about 4" deep so NO digging to China.  They may or my not give an over load depending on your detector. ALL Cashes Contain SILVER However they contain many other things as well! This means once your in an area that may contain a cashe you need to switch to all metal mode... some Cashes may not show up in the Coin & Jewelry Setting.