i hunt them when i find them.
in this country they used to be a favorite drop down for weapons used to commit crimes.
also found in them are medicine bottles, eye glasses, pocket watches, coins of all kinds..., ..., ...
in isreal what are believed to be the temple treasures from the first temple(solomons') were found in a privy dug in a cave where jews hid from romans trying to kill them. also found in the privy was manuscript pressed into cooper sheets that were rolled up along with what are believed to be alter implements from the temple itself.
i personally have doug one and lived with it but nothing went in mine that did not come out of my backside except toilet paper and stuff to keep it sanitary.
it is the most satisfying thing i have ever done. i wish i still had one.
one day i shall build another.
"the TOILET PAPERS" by Sim Van der Ryn is the definative book on how to build and run one.