Duane I think (his son)
It was a rabbits foot. Probably his his son, wife and something else.
It might've just been the show's excuse for him to find the map, but I could be wrong. Otherwise, it could be a religious reference to the verse Luke 6:38 from the Bible, which states: "Give, and it will be given to you. Good measure, pressed down, shaken together, running over, will be put into your lap. For with the measure you use it will be measured back to you.”
It means for what you give to God (which are the things he placed) shall be given back to you.
This hints that Morgan is of the Christian religion (similar to myself)