Cyclone on Horseback

A rugged horse rancher who delivers a herd to Valley City and becomes the backbone of the project. He chases Wayne's men, defends Mary, and lends Jeff money to keep the job afloat. His loyalty, quick thinking, and willingness to risk himself drive the action to its finish.

Jeff's sister who holds negotiable bonds and promises to secure his payment. She backs Stan's efforts to clear Jeff's name, endures arrest, and maintains faith that the bonds are legitimate. Her resilience and sharp wit keep the plot grounded in practical sense and loyalty.

The underbidder on the telephone-line contract who relies on bonds to pay workers. He depends on Stan to keep the project alive and hopes to cash the bonds to meet obligations. He faces danger and injury when Wayne's plan escalates, highlighting the fine line between risk and responsibility.

The antagonist who pressures for the contract and tries to steal the bonds, sending his men to harass workers and derail payments. His scheming culminates in confrontations with Stan and the others and ends with his defeat and arrest.

One of Stan's companions who helps manage the operation and adds color to the frontier—singing in the diner and contributing to the crew's morale.

A loyal ally of Stan who supports the group through chases and fights, providing humor and resilience as they defend the work camp and complete the line.

The local banker who initially suspects stolen bonds but ultimately substantiates their legitimacy, helping Jeff and Mary clear their names.

The law officer who enforces order, moves from arresting Stan to supporting the exoneration of Jeff and Mary, embodying frontier justice and accountability.

An associate of Cobb Wayne who participates in the antagonistic effort to derail the project and intimidate workers before Stan's crew drives them off.