Any info on F.S. Heath and/or the Penman's Directory mentioned?
I'd completely forgotten to look for that, it's lucky you mentioned it.
I couldn't find anything on the Penman's Directory in the 'Art Journal or the Business Educator unfortunately, but Frederick Heath, described in one issue of the Business Educator as 'the well known expert penman of Concord, N.H', appears many times times in the Penman's art journal and the Business Educator, from the 1890s with the last appearance being in 1918, when he sent in a letter sharing his memories of C.P Zaner, with respect to the awful tragic death of Zaner. Heath usually appeared for sending in high quality examples of ornamental penmanship. He also took out advertisements selling blank cards of all sorts of different colours suitable for ornamental penmanship. Francis B. Courtney endorsed his cards.
A photograph of F.S. Heath is here, on the middle left:
https://archive.org/stream/penmansartjourna29nati#page/8/mode/1upFrom 1902, an example of plain practical penmanship from Heath:
https://archive.org/stream/businesseducator08zane#page/n217/mode/1upIn 1907, the Penman's Art Journal ran a course of lessons in Ornamental penmanship by him, one of the pages of which is here:
https://archive.org/stream/penmansartjourna31nati#page/302/mode/2upHeath also collected and studied oblique pen holders, and wrote an illustrated article on oblique holdersand how different ones affected his writing in different ways, which appears here in a 1914 issue of the 'Educator:
https://archive.org/stream/businesseducator18zane#page/n141/