Dalton's Mission. Large Print (en Inglés) - Ed Law

When Dalton and Loren Steele happen across an ambushed gold shipment, they are too late to help. Everyone dies, attackers and defenders alike. Being honest men they try to return the gold to Perry Haynes of the Durando Mining Company, its rightful owner, but unbeknown to them Perry has been overthrown.
With corruption and the law of the gun now ruling in Durando they are slammed into jail on the dubious charge of having stolen the very gold they had rescued!
The two men befriend Perry but to help him reclaim his mine, they'll have to strap on their six-shooters and tame the hell-hole that is Durando.