Dead Man's Gold — J. Allan Dunn

When an old prospector is mortally wounded in a gunfight, he reveals to his three mining partners the location of an unimaginably rich vein of gold. To ensure the men will work together, and procuring a promise to share their find with his long-lost daughter, the prospector entrusts each man with a different clue to the gold's location before he dies. But finding their fortune will stretch each man to his limit, forcing them to brave a Mexican crime lord, angry Apaches, the rigors of the desert, and their own greed. To say nothing of finding their old partner's missing daughter. Dead Man's Gold is a western adventure skillfully crafted by one of the top pulp writers of his time.