In the Diplomatic Service

1916

The Prussian Cur

1918

Negresco

1968

Assignment Abroad

1955

Asylum for a Spy

1965

The Delphi Bureau: The Merchant of Death Assignment

1972

Destiny of a Spy

1969

Secret Orders

1926

Spy of Napoleon

1936

The Sky Parade

1936

The Stolen Treaty

1917

Trappola per sette spie

1966

Target Hong Kong

1953

Smashing the Spy Ring

1938

Red Snow

1952

Aventura en Arabia

1944

The Lady Has Plans

1942

Inside the Lines

1918

Forever Red

2020