There is a reasonable possibility that John Robert Gregg structured his shorthand on the Mnemonic major system based on the previous work of Pierre Hérigone and others following the publication of "The Anti-Absurd or Phrenotypic English Pronouncing and Orthographical Dictionary" by Major Beniowski in 1845.
https://archive.org/details/antiabsurdorphr01benigoog
http://boffosocko.com/2014/07/05/the-mnemonic-major-system-and-gregg-shorthand-have-the-same-underlying-structure/
http://blog.artofmemory.com/history-of-the-major-system-1092.html
#Shorthand #Memory