J. Ernest Williamson

In the peaceful kingdom of Hetvia, Count Dakkar prepares two high-tech submarines to explore the ocean depths. Jealous of Hetvia's bounty and eager for war, the wicked Baron Hubert Falon attempts to steal the two submersibles for nefarious use. An undersea chase ensues, which leads the two rivals, along with Dakkar's daughter and her lover, into a secret world ruled by a race of strange aquatic creatures.

A poor but brilliant inventor sets out to make his fortune by discovering buried treasure, with the aid of a special inverted periscope through which he can view the ocean floor.

Directed by Carl Gregory.

The ocean depths are explored with the aid of a submarine chamber of Williamson's invention and a few hardy souls. The construction of the device is examined; but most of the footage is given to plant and animal life, a girl swimming among the coral growths, and two divers who encounter a moray and an octopus.

In the peaceful kingdom of Hetvia, Count Dakkar prepares two high-tech submarines to explore the ocean depths. Jealous of Hetvia's bounty and eager for war, the wicked Baron Hubert Falon attempts to steal the two submersibles for nefarious use. An undersea chase ensues, which leads the two rivals, along with Dakkar's daughter and her lover, into a secret world ruled by a race of strange aquatic creatures.

A poor but brilliant inventor sets out to make his fortune by discovering buried treasure, with the aid of a special inverted periscope through which he can view the ocean floor.

The ocean depths are explored with the aid of a submarine chamber of Williamson's invention and a few hardy souls. The construction of the device is examined; but most of the footage is given to plant and animal life, a girl swimming among the coral growths, and two divers who encounter a moray and an octopus.