Construction Markings.

We have a Dispatch from Comrade Dan, featuring graphite markings from a garage’s construction:
“Found these markings under door stop strips on the interior side of a garage door. They were probably written some 75 to 80 years ago and appeared as if only scribbled on yesterday. The first and last pics are of measurements and the second and third are, I believe, either the signature of the carpenter or the carpenter’s name penciled on by the yard for his order. I run into this quite often but this was the first time I thought to take a picture of it.”
Many thanks to Dan, and I hope we get more of these in the future!