"Once, when passing through the Inner City [of Vienna], I suddenly encountered a phenomenon in a long caftan and wearing black sidelocks. My first thought was; Is this a Jew? They certainly did not have this appearance in Linz. I watched the man stealthily and cautiously; but the longer I gazed at that strange countenance and examined it feature by feature, the more the question shaped itself in my brain: Is this a German?"
January 1, 1970
https://en.wikiquote.org/wiki/Mein_Kampf