Jim --

In this instance, besides knowing the history of the house, and with it being obvious that there is also no reused timber in its frame…

The chisel and crayon marks do make sense with one another, and share the same numbers – The chisel was used to mark the 1st fl studs and the sill at each stud, crayon was used to mark the 2nd fl studs and the girts at each stud.

I had just never seen this logical mixed use before.

Funny thing is this is only a tall posted cape, the 2nd fl studs are all short, no confusing them with the ones below them, chisel would’ve served, even without flags. The marking system this framing crew used was likely one they developed for full two story frames, and just ran with out of force of habit.

Finding fun in the details