Thank you so very much Revenuecollector. This is invaluable information. I am attempting to write a brief summary of the skull cancel similar to work on the Devil with Pitchfork cancel done by W. J. Duffney (
http://www.ctpostalhistory.com/CtPP...pril2012.pdf).
What I am now curious about is why so very few postmasters utilized the commercial cancel if someone like Beckwith had developed a superior skull design by the 1860s. The only commercially produced cancel I have been able to find is the one shared by Coleville, PA Gardner, MA and Columbus, NJ (all used in the 1880s).
Seen here:

I've read Richard John's book and know that the postmasters were aware of others fancy-cancel work, hence the proliferation, but if Beckwith just used his design for proprietary marks it could've gone unnoticed? Fascinating.
I also get the "skull and bones" college club crossover to Beckwith's profession but believe most postmasters thought it was a visually-literal way of "killing" the stamp. Then tie in William Jackson's addition of KKK to the skull and x-bones for Union Mills cancels and the meaning turns to promotion/propaganda.
Pic for those interested:

JanS: Fancy cancels are my passion. From the geometric "garden path" to the straight forward N/S handshake after the war. I see it as art upon art, if preserved well providing truly rare gems. It just shows you how stamps don't need to be "mint" to hold beauty or value.