Issue: #31
The Daltons are transfered to a prison close to the mexican border. There they will meet Don Emilio and his gang. The join forces to get bigger loots.
First appearances: Emilio Espuelas
Creators: Morris, René Goscinny
Characters: Jolly Jumper, Jack Dalton, Averell Dalton, William Dalton, Joe Dalton, Rantanplan, Emilio Espuelas, Lucky Luke