Or perhaps, "So what?"
Because I am trying to write a post on whether the use of circle geometry died when architects took over design from builders, as has been suggested. I don't think so, but as I put together an answer I am asking myself more questions. So my understanding needs to be more thorough. I need to follow up on those directions of inquiry, see where they go and what's there.
I am beginning to think the answer has to do with how master builders, masons, joiners, and architects transferred information to workers. Drawings on paper? A reference cut in a stone ? A diagram on sheathing? Hatch marks meant for assembly on posts and beams?
So my 'research' on measuring turns out to be generic to thinking about the history of regulating lines.
I don't know who is actively following this, but if you are, please read the posts on measuring.
Note: This is when I think being an architect as well as an historian makes the difference. I know a lot about architectural drawings, about what actually goes into providing good information to the people who will be constructing what's in my head. Without that experience I might not even know it could be historically important.