Knights of the Bar 10

the long version

"As the Bar 10 boys go to bed in their downtown hotel, they are unaware of what is occurring in the plushest part of town. Corrupt cattle agent Roscoe Martin has hired the infamous gunfighter Chance Taylor to rob the weary Circl O and Lazy J boys of their money as they make their way home. When it comes to light, Gene Adams and his cowboys must saddle up in a bid to warn their rivals. They are no longer just cowboys: they are Knights of the Bar 10"--Publisher description.