I'm a history nerd and when I see something like this I go nuts like Ernest...
What fascinates me is two things: (1) the level of detail of his instructions & (2) the multiple refinements to his recipe. Some of them are repetitive like adding capers and soy - both a seriously damn good salt source. Others baffle me like what in the hell is stanford ham? But I'm gonna try to recreate it.
Maybe the pursuit of the bestest burger is what drove Hemingway insane and towards an untimely death. Or maybe he never wanted to be on a Guy Fieri game show in which his burgers were referred to as 'Banging'. That'd test the moral fiber of any artist.