When it comes to iron mounted contemporary guns, there are really two eras - BH (before Hershel) and after.
Hershel went through a phase where he built a number of guns with architecture and patchboxes directly inspired by the Young rifles, blended with influences from other southern rifles of the late flint period - Bulls, Beans, and others. He was really the first one I know of to use the Jacob Young rifles as a significant influence. The first rifle of this sort I ever saw was when I was about 12 years old and got to meet Hershel when he brought one in to show a local gunshop owner he used to visit up near us on occasion and had several of his rifles. It made an impression that stuck with me to this day.
Lots of folks who learned from Hershel carried the idea forward as well - Steve Davis is a good example. Hershel later took elements that had inspired him from the Jacob Young rifles, iron mounted guns by the Bulls and others, but "de-evolved" them and blended them with influences from early rifles he had studied, handled, restored, admired - to produce his vision of what early iron mounted guns of the 1770s-90s might have been - to develop his unique early styled Woodbury guns with the wide butts, big triggerguards, etc. I am sure Earl Lanning was a big influence on his work in this regard. If you are familiar with the originals, it is fun to look at his guns and see glimpses of familiar things reinterpreted through his vision, and set to metal and wood by his hand. Frank's guns also do this, and he has taken his toward his own unique styles and vision of early rifles made and used in the Watauga region.
It is funny - there are so many great southern guns coming to light these days that are not in any of the well known books, but whenever I see a new one I have not seen before it looks to me like Hershel has already been there and absorbed it into his palette 30 years ago.
It is like all great art. To me it it is sort of like when you look at your kids faces, and something they will do or look at you a certain way all of a sudden makes you see a glimpse of one of your parents, or a sibling or grandparent, in their countenance. They are unique in their own way, yet carry forth the traces of those that came before.
Guy