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.

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

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

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....

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

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

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...

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

Hop Harrigan, a top Air Corps pilot, leaves the military and he and his mechanic, Tank Tinker, open ...

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

The mysterious Don Del Oro ("Lord of Gold"), an idol of the Yaqui Indians, plans to take over the go...

A wealthy young athlete comes to the aid of a beautiful heiress, whose fortune is being threatened b...

In Africa, a deceased medical missionary's daughter in Africa carries on her father's work. Before l...

The heirs of Anton Benson are searching Bensonhurst for hidden gold; they are joined by a reporter, ...

In this 12 Chapter serial the UN enlists trader Tom Rogers and Vivian Wells, to lead the effort to p...

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

It is 1865 and Union prisoners use a military balloon to escape a Southern prison camp near the end ...

When a bank executive disappears, he is accused of stealing a fortune from the bank. But his daughte...