The Shielding Shadow

The Shielding Shadow
Overview
The 15 chapter story involves the heroine being protected by a shadow with burning eyes. There's also a cloak of invisibility, some hypnotism and a giant octopus added to the mix.
Similar
The Wolf Dog (1933)
Perils of the Royal Mounted (1942)
The New Adventures of Tarzan (1935)
One Stolen Night (1929)
Flash Gordon (1936)
Drums of Fu Manchu (1940)
Cody of the Pony Express (1950)
The Adventures of Ruth (1919)
King of the Mounties (1942)
Doctor Who: The Daleks' Master Plan (1966)
Cappy Ricks (1921)
The Spider Returns (1941)
Scouts to the Rescue (1939)
Jesse James Rides Again (1947)
The Adventures of Smilin' Jack (1943)
Rustlers of Red Dog (1935)
Bride 13 (1920)
Zorro's Fighting Legion (1939)
The Story of the Kelly Gang (1906)
The House of Hate (1918)