Greenmantle (Spy & Mystery Series). Buchan John

very slowly he shook me so that my teeth seemed loosened and my head swam. He let me go and I dropped limply back in the chair.

      ‘Now, go! Futsack! And remember that I am your master. I, Ulrich von Stumm, who owns you as a Kaffir owns his mongrel. Germany may have some use for you, my friend, when you fear me as you never feared your God.’

      As I walked dizzily away the big man was smiling in his horrible way, and that little official was blinking and smiling too. I had struck a dashed queer country, so queer that I had had no time to remember that for the first time in my life I had been bullied without hitting back. When I realized it I nearly choked with anger. But I thanked heaven I had shown no temper, for I remembered my mission. Luck seemed to have brought me into useful company.