Cold trail a western duo

Del Halliday had originally bought his range from Spot Sherill of the Double S Circle, in "Stampede at Avalanche Pass." Sherill assumed that the lack of water on that range rendered it useless, but with some strategically placed dynamite, Del uncovered an underground river. Now Sherill wants his range back, and when words fail to convince Del to sell it back to him at the original price, he starts plotting other means of persuasion. "Cold Trail"...