I've spent some time revisiting the barbers manual from 1961. I can only imagine how cool it would be to actually have taken that class. Anyway, I noted the student, whoever that might be, took notes in the margin of the book. Many of these are unreadible but three stand out that I find interesting. In the margin on the section on stropping are some interesting notes. One is what I interpret to be "the estimated number xxxxxxxx is 15 times of the razor" and "the length of the stropping stroke should be from 6-10 inches" and finally "the razor should remain in contact with the strop at all times".

Those first two are kind of interesting.

One of the things I like about this document is the lack of reference to stropping with a light touch, insisting rather clearly that pressure is used but even given that pressure is used I'm surprised that a reference is made to a 6-10 inch stroke. Quite a bit less distance than I typically use myself.