Dayle Lymoine Robertson was an American actor best known for his starring roles on television. He played the roving investigator Jim Hardie in the long-running NBC/ABC hit television series Tales of Wells Fargo, and Ben Calhoun, the owner of an incomplete railroad line in ABC's The Iron Horse. He was often presented as a deceptively thoughtful but modest Western hero. From 1968 to 1970, Robertson was the fourth and final host of the syndicated Death Valley Days anthology series.…