I was also going to say his claim marker. I think the month is under the damage but the O is odd because no month abbreviation ends in O..Could A with a circle around it stand for August. Also could it have been a claim marker... Piles of rocks were used for that as well!
Its a negative.How the heck did you do that?
Hot zone said:Mx... M for double hump, x marks spot ...arrow points to Arabs grave....the holes from bullets.
I am sure he is digging at this moment, I would!I would dig at the x, could be worth a shot. Seems that Jacob went to a lot of trouble to carve the rock if it was only for a camel.