I wonder if Mr. Camm was in charge of one of Greener's workshops. The letter for my Greener describes the names (but not first names) of all the men that worked on my gun and its dates for starting and finishing the gun. In my case, the metal work was all done in the Miller shop (action, locks, barrels).

While it did not say so explicitly, the letter implied that the Greener operation was a number of workshops that ran in parallel. I could easily imagine that Mr. Camm's workshop was designated for the "best" guns.

...never pay Dave "one more dime"