Wouldn't "the man with the secretary's inkhorn" be... I dunno... THE SECRETARY !?!?!?!?!
Evidently, the secretary that does the marking is the composite Congregation Secretary Class. An elder in each congregation uses his "inkhorn" to fill out paperwork including Congregation Publishers Record Cards, letters of recommendation, forms for disfellowshipping, etc. Although this work is often kept secret, as if it is something invisible, the paperwork generated means life and death for a publisher and his prospect of eternal panda-petting paradise.
Whew! I think that nulite is better than anything Botchtower Corp could come up with.