Daniel Robin has become mixed up with a band of criminals known as "the 13," and is shot when he refuses to do their bidding. His daughter Ruth, brought home from boarding school, reaches his bedside before he expires. He tells her that she will be given thirteen keys. Instructions will be provided with each key and, if she follows the instructions, she will eventually fully learn of her birthright. Many adventures then follow as Ruth attempts to solve the puzzle of each key and establish her true birthright.

A movie serial in 12 chapters: The famous comic strip character is on a mission to protect a secret...

Irrepressible Helen Rhinelander, the daughter of a railroad president. A dastardly villain, Segrue, ...

A serial in 12 chapters. Tarzan goes to Guatemala to find his lost friend, D'Arnot. On the way he h...

Disaster seems imminent when scientists discover that the planet Mongo is about to crash into Earth....

The nefarious Dr. Fu Manchu searches for the keys to the tomb of Genghis Khan, in order to fulfill a...

Eddie King goes up against a villainous circus owner in this action adventure which was directed by ...

Professor Campbell's expedition into the hills of Libya obtains a papyrus which might reveal the hid...

Rosalind Joy is a constantly imperiled heiress to a fortune in gold. An 18 part adventure serial

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A beautiful young woman is a daring master thief. She meets the young millionaire Thomas Babbington ...

A young heiress of an American gun factory is threatened by a masked man after her father was murder...

Elmo finds himself in 18 different hair raising and dangerous adventures always escaping in the nick...

Mr. Lincoln's tremendous physique fits him especially for serial work, where strength and daring are...

A movie serial in 12 chapters: After gold is discovered in the town of Nugget, the titular band of ...

The Timber Queen follows Ruth Rowland as the inheritor of a wealthy timber business who tries to st...

Richard Grant, imprisoned in India for a crime he did not commit, escapes and makes his way to Afric...