I actually found a lot of bones in what looked like a BBQ pit about 3-4ft down. So I assumed it was animal bone. But odd thing about it was, they burned marbles, toy cars, a tax token, a ton of glass medicine bottles, a padlock, dog/cat tag with the name and address of animal hospital, brass door hinges, a chauffeurs badge, what looked to be a tiny ankle or wrist restraint w/ a chain, and a lot more. The AZ tax token was dated from 1937-1940, and the chauffeurs badge and animal hospital tag have 1948 dated on them.