Ok, tor network is functioning. I am on the web in full anonymity.
I'll just bring that picture along for the convenience.
The separation of the subject and the object is to wide to portray a specific linkage, they both exist in isolation from one another.
These people were generalists doing everything from framing to detailed profile work.
In my subjective view I see strong resemblances of facial characteristics between the men so think Roger's right about the family business. You rarely see smiles in these pictures because exposure times for the camera were to long to sustain the effort.
It's not only the soles of shoes we look at there but what supports them in that particular position and what is behind the tool box. It does suggest someone laying down on the job at least.