A German spy who is married to Lillian, the sister of Rosie O'Grady.
Negresco
Smashing the Spy Ring
Asylum for a Spy
The Delphi Bureau: The Merchant of Death Assignment
Secret Orders
Destiny of a Spy
Spy of Napoleon
True Heaven
Trap for Seven Spies
In the Diplomatic Service
The Sky Parade
The Stolen Treaty
