I just stumbled across this,
Looks pretty much Primal, but over 50 years old and the diet idea was used 100 years before that, this was published just before the whole Saturated fat fear came into play.
I just looked at the quick guide and Chapter 1 pretty much the same as Mark & other Paleo people advocate now, I wonder how different the world would be if this took off in 1958?

Eat Fat And Grow Slim by Richard Mackarness (1958)