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The Big Diamond Robbery Synopsis

Tom Markham is the foreman of an Arizona dude ranch. He travels to the "big city" for a meeting with the ranch's owner, George Brooks, after which he will accompany Brooks' daughter Ellen back to the ranch. Brooks tells Tom about the Regent diamond, a valuable stone that Brooks has set in a ring for Ellen. Ellen's friend Rodney Stevens hears about it. Stevens, who is actually the boss of a bandit gang, has his men steal the diamond, but Tom manages to get it back. Stevens doesn't give up, though, and hatches a plan that will get him back the diamond and frame Tom for stealing it.

The Key to Power Synopsis

Bruce Wendell, the son of West Virginia coal mine owner James Wendell, graduates from West Point and prepares to lead a fighting unit to the front during World War I. As his father lies dying, however, he convinces Bruce to remain at home and guard the mine. Bruce's fiancée Ann Blair assumes that he is a coward and breaks off their engagement, but her brother Bobbie remains Bruce's loyal friend. Meyer, a German agent, persuades railroad president Parrish to refuse to transport Wendell's coal, but when Bruce adamantly refuses to close the mine, the spy's men decide to blow it up. While Ann is being abducted by Meyer, Bobbie is buried in an explosion at the mine. Bruce rescues Bobbie and then sends a plea to Lieutenant Parrish to rescue Ann. Meyer and his gang are captured and Ann renews her vow of love to Bruce.