A runaway stage shows up at the swing station with no trace of the driver and its strongbox missing. The next morning the Sheriff and Mr. Dyke, who had $10,000 in the missing strongbox, come to the station and find the body of the missing driver and an empty strongbox in the station's barn. Slim and Jess are charged with murder and robbery and have to prove their innocence.; Carlos, a witness in a murder trial, disappears during a stop at the swing station. Slim and Jess have to rescue Carlos from three gunmen who have him trapped in a cave.; Comparison of the Conestoga Wagon and the Concord stagecoach.; Description of "swing stations," stagecoach stops where passengers could buy food, rest and stretch their legs.