Fresh out of German mid-century almanacs here. The reason I ask is, in the world of debate it is absolutely astonishing how many times people repeat things over and over again with no proof whatsoever. And then when it comes out that there is lots more opinion and conjecture than proof, the response is usally "Well, everyone knows THAT." I am not saying that no proof of your conjecture can be found. I am just trying to get to the facts, and nothing presents facts better than evidence. I am sure you understand.
But, to sum up, what you are saying is, you have no proof then.