Kirk Baxter has been sent to investigate murder and robbery involving gold shipments. Identifying a gang member by his bullets, he uses that man's horse to locate and join the gang. He learns the gang is tipped off to the shipments by a mine employee using carrier pigeons. But the next message reveals his true identity and he is made a prisoner.
The Courageous Avenger
An agent sent to investigate the thefts of gold bullion shipments discovers that the mine owner is behind it. He also finds out that the owner has his gang capture travelers in the desert to use as slave labor in the mine.