Lost banshee mine [a Ralph Compton western]

"England Dan Rutledge and his partner John Cooley have worked their claim for a year and are barely eking out a living. When Cooley shows up with a map of the abandoned Irish Lord Mine he drunkenly bought off a shady cowboy, England Dan is sure it's a complete fraud. Then England Dan gets a good look at the map. Maybe they have the key to a fortune after all! When an infamous bank robber shows up looking for this mysterious map, England Dan and h...