Old disaster areas many times are reclaimed, so to speak, and built over, paved over, and generally re-used by the particular community when you are dealing with a 108 yr old situation. It would depend on the location, and if it was now reclaimed and legal on my part to be there. I wouldn't be there if it was illegal to do so but considering for this discussion that it is legal to be there, I would be personally and moraly bound to try and locate family if any identifiable pieces of jewelery are found, or the authorities if a body were found by me. These are just my personal beliefs but if non identifiable objects/jewelery were found, I'd go on about my MDing without notifying anyone.