In A Scent of Mystery:
Hessian expatriate from the minor nobility, in England since the mid-thirties when he represented the business interests of the Weimar Republic. Estranged friend of Jules Morrison, Secretary to Gruppenfuhrer Helga Smidcht, now a friend of the Duke and Duchess of Kent and a fond acquaintance of whom he believes to be HIH the Tsesarevich Alexei.
A double agent of sorts, whose first loyalty is to the Resistance in keeping with the conscientious objector status he held during the Great War. Much like Olga of Yugoslavia, he has gotten pulled into outward collaboration with the Reich. Right now he acts on a hunch that due to his associations with royalty and a certain aloofness he has been showing since he met the Russian Heir, he is being watched by Herr Morrison and the Ministry of Defence. Time for him to play along!
A Scent of Mystery