THOMAS, W.Va. — The Allegheny Mountains in eastern West Virginia grow treacherous in winter—and hardly more so than along the western front of that range, which bears the brunt of blizzards coming off the Monongahela Valley. In 1885, twenty-year-old James B. Helmick came face-to-face with the savagery of the Alleghenies while hunting on Backbone Mountain. His harrowing tale, which was recounted in the W.Va. Heritage Encyclopedia, captures the essence of life on the edge of a hostile…