I have been digging outhouse pits for over 40+ years. Have found bottles ,jugs,coins ,tokens,guns,brass knuckles,dolls,marbles,etc,etc. You will need a probe, go to your local junkyard,look for the spring steel rods on the trunk lid of larger cars, caddilacs,buicks etc,then have a handle put on it and start probing. Look for sunken spots with taller grass than the surrounding area,privy pits will commonly settle and sink some. Take a screen to sift the dirt for coins,tokens,etc. I included a pic of a typical colorado outhouse pit and a drawing of a pit and probe. Hope this helps and good luck !!!