This story, “Nightmare on Missinaibi,” first appeared in the August 1972 issue of Outdoor Life. DARKNESS HAD FALLEN on the rugged Missinaibi Lake area of northern Ontario by the time we had unloaded the van and set up camp at the lake’s edge. The day was Thursday, September 30, 1971. My companion, Gerald L. Julius of Massillon, Ohio, and I were vacationing from our jobs at the Ashland Oil & Refinery Co. of Canton, Ohio. Reports of pictographs —…