1865: an American Treasure Hunt

My name is John, a sick man who traveled to the end of the Civil War. I originally thought I could only wait for death, but I didn't expect that I was bound to a gold points system: absorbing gold can make you stronger and extend your life. One day, a drunkard confided a secret to me. A ton of gold was tattooed on the bodies of 11 death row prisoners. After he sobered up, the other party wanted to kill me to silence me. Now, I hold the knife and the human skin map and look into the distance. I have only one goal. "Stay alive!"