if they are slave remains, you need to start excavating immediately! anything other than bones are worth ALOT of money! slave tags, tools pots and pans, most importantly leggings are almost priceless!!!!! be sure to log every little peice of info. about depth found, exactly where found etc... you could've found a gold mine! slave history is very hard to come by. there just is'nt much physical evidence out there. you'll almost never find headstones cause most plantation owners did'nt bother to have a formal burial. either way, DIG, DIG, DIG!!!!!