Lucky Luke, Tome 45 :

Résumé

Urgent message for the Dalton brothers: the president has approved a special measure to combat overpopulation in the country's prisons. They're going to be - hanged! Their last hope lies in a little known law that would see them walk free if they were to marry. A frantic Ma Dalton tries to locate brides for her boys, but their reputation precedes them, and the only candidates she eventually locates could well turn out to be a worse choice than the rope...