I found this really great barbers manual from the U.S. National Archives. It can be downloaded in many different formats including PDF or can be read online. It has some good and interesting info like honing and stropping. Its originally from 1911 but was revised in 1928. Maybe SRP will want to add it to its database? It not, no matter, just posting it because its cool.
:chapeau
https://archive.org/details/barbersmanual00mole
