Wow. Diamonds. Baseball fans.
First recorded case in history of “tagging” with graffiti? Little Gronk got a big spanking for that one.
No..........I think those are primitive playing cards. They didn’t have paper yet. That’s the deuce of diamonds they’ve found. Can’t wait to see the whole deck. No wonder so many of those people, especially poker players, had hernias.
Diamonds? Maybe. Or perhaps something more sophisticated. Looks like a 3 dimensional drawing of parallel planes to me.
Looks to me like a “coach’s board”, probably for neolithic gridiron football.
The first pic is the offense vs defense line. The lighter scratches are what the backfield is going to be doing.
The second pic is, obviously, 3 offensive linemen leading the block on a sweep with the linebacker and free safety as the objects to be blocked.