Frankfurter Zeitung, 29th April 1938. The contemporary publication referred to in Note 16 reports this as follows:
'Over a dozen years he had ... bound his fate to that of the Führer. And yet only a few knew about the man whom Adolf Hitler in April of this year appointed as his deputy in the party leadership. No one spoke of him. You hardly came across his name. He was seldom seen in pictures. You never heard one of his speeches. Until the Führer himself put him into the public spotlight. Until he stepped out of the background.