I have not dug one either but I would not hesitate to do so if there were enough time to do it. I have heard stories of coins, jewelry, and pocketwatches being lost in them. Also I am 55 years old and remember my grandfather talking about people in the 30's that were afraid of banks and wanting a safe place to hide their valuables. He said there were stories about people hiding valuables in the outhouse hole by suspending a jar that was secured by a wire or twine and lowered into the "soupy stuff". The other end of the wire or twine was fastened under the seat and near a corner. Come time to make a withdrawal or deposit one would bring a container of water to rinse off the "bank" before opening.