Tell him to read The Illusion of Democracy: A More Accurate History of the Modern United States. Tons of examples.

It should go beyond official documents to include items found in popular culture, for example there are many instances of the term "bluebird" used in Hollywood movies and music. My thesis is these projects predate government use. They were in use much earlier and come from the privately-owned infrastructure of intelligence created by (((prominent elite businessmen))). These social projects are how the colonies are remotely managed from London.

No much will be found in official documents, and that's by design.

I wish him luck!