Peter A Goldsbury
Have you ever discussed these issues with Iida Sensei?
The only direct connection to the Silence Principle of which I am aware is how Mutsuru Nakazono deals with the myths supposedly recorded in the Takeuchi Documents. I am thinking of Nakazono Sensei's revelations about the Kotodama Principle, discussed in my TIE columns on kotodama. (Actually, of all the TIE columns that have to be revised in preparation for a future book, the kotodama columns are the ones most in need of revision and expansion. There is so much more that needs to be said and this also includes putting O Sensei's discourses in a better context.)
According to Nakazono, the pristine civilization captured in the phrase 'Sumera Mikoto' somehow entered into a conspiracy of silence, in order to hide all traces of their civilization and to allow only 'chosen' individuals, like Nakazono (and for reasons even more unknown) to catch a glimpse--by way of utterly arcane interpretations of a set of scrolls generally thought by some academic to be forgeries.
There is an added twist. Neal Stephenson in his novel Snow Crash refers to Sumera Mikoto and suggests that this refers to the ancient Sumerian culture, in which,he believes, a sort of proto-language was spoken, rather like the ancient, pure, Japanese spoken by the original Yamato race, whose existence was argued for by kokugaku scholars like Kamo no Mabuchi.
There is a very interesting treatment of the Takeuchi documents by Kosaka Wado. He has not, unfortunately, been translated into English.
I did ask him about this but he went silent
The "SP" as treated in in the Barber's book differs from Japanese approaches to "silence" in that it's not a "silence of secrecy". Rather, when important,complex information is transmitted orally, a type of "shorthand develops so that only the most vital information is expressed. This is in order to help memorization.
So for example, When Ulysses and his men flee from Polyphemus the Cyclops (a one eyed giant) who flings rocks after them , the fact that the story refers to a volcanic eruption is never explicitly mentioned in the story, as it is assumed that everyone listening to this story will know what is meant by the terms.
Anyway, I brought this to attention in the hope that someone with more intellectual rigour than myself might be able to analyse the points made with regard to the "transmission" of the Aiki arts (How's that for Sakura?). It's another angle, basically.
Anyway, I'll leave it at that for the moment!