Round-Up Time in Texas

Gene is a bold, quick-thinking rancher who defends his brother Tex and his partners from Cardigan's scheme. He stays skeptical of Cardigan’s telegrams and uses wit and courage to uncover deception. Across the voyage and jungle chase, he stays determined to free Tex and secure justice for Barclay and his mine.

Champ is Gene's loyal horse and trusted partner on the cattle drive and the overseas mission. He helps Gene scout, carry supplies, and aid in evasive maneuvers when trouble arises. The horse's presence underlines the frontier spirit of the tale.

Barkey is a crafty English con artist hired as Gene's auctioneer, bringing a flashy exterior and opportunistic intents. He participates in the horse sale and navigation of Cardigan's schemes, creating tension and misdirection. His loyalties remain questionable, guiding events with a mix of wit and self-interest.

Cardigan is the jealous saloon owner who grubstaked Tex and Barclay, seeking sole control of the mine and wealth. He manipulates telegrams and uses henchmen to pursue Gene, Tex, and the diamonds. His schemes crumble as Gene uncovers the deception and the law closes in.

Gwen is Barclay's daughter and a saloon singer who becomes entangled with Gene. She offers support and becomes a moral anchor for Tex's fate and the fight against Cardigan. Her presence adds romance and resilience to the frontier adventures.

Tex is Gene's brother and a finder of a big diamond strike in South Africa; he is wounded and pursued by Cardigan's men, eventually captured as a slave. His peril drives Gene's mission and motivates their alliance with Gwen and Barkey. His survival hinges on the rescue efforts.

Frog is Gene's loyal sidekick and comic foil whose musical talent helps defuse danger and win over Chief Bosuto. He negotiates with natives and uses song to ease suspicions, even choosing to stay behind to teach music to Bosuto's children. His bravery and charm keep the group's spirits high.

Bosuto is the native chief who initially threatens sacrifice but is won over by Frog's music. He permits the group to go after they earn his respect and the magic of song. He embodies cultural power and the challenging moral choices facing outsiders.

Namba is Cardigan's servant who appears at the auction and becomes a key ally of Cardigan in the pursuit of diamonds. He helps track Tex and Gene with the belt buckle as a clue. His role highlights the shadowy side of the mining plot.

Johnson is Cardigan's ruthless henchman who plans to kill the Texans and facilitates the illegal diamond plot. He trades uncut diamonds for a horse and tries to capture Gene and Frog. His final confrontation ends with his death as Gene fights Cardigan.

The son of Chief Bosuto appears in the jungle sequences as part of the native community. Though minor, he represents Bosuto's lineage and the cultural context of the rescue.

Frankie Marvin appears as a supporting cowboy or soldier, adding frontier flavor to the expedition and the perilous voyage. He contributes to the action with typical Western bravado.