Apparently the planned blog post for both Friday and yesterday never got through - if you can rely on anything, it's modern technology doing weird things once in a while.
To make it up for you, I have something very special today: A mystery! This piece of bone was found in a dig in Austria. It's rib bone of either horse or cow, with sawed-off sides (not polished or smoothed). Both lengthwise edges are worn smooth or wear-polished.
If you've seen anything like this before, or have an idea for what it could have been used, please let me know!
The holes have clearly been worn in the direction pointing towards the wear-notches. My thought is maybe an equivalent to the large round object with channels for the rope to sit in that is used in the second phase (plying phase) of rope making using a rope walk. Obviously on a much smaller scale. However, if that's the case why would there be two holes and two wear-notches rather than four holes.