The Saga of Hugh Glass: Pirate, Pawnee, and Mountain Man by John Myers Myers
Before his most fabulous adventure (celebrated by John G. Neihardt in The Song of Hugh Glass and by Frederick Manfred in Lord Grizzly), Hugh Glass was captured by the buccaneer Jean Lafitte and turned pirate himself until his first chance to escape. Soon he fell prisoner to the Pawnees and lived for four years as one of them before he managed to make his way to St. Louis. Next he joined a group of trappers to open up the fur-rich, Indian-held territory of the Upper Missouri River. Then unfolds the legend of a man who survived under impossible conditions: robbed and left to die by his comrades, he struggled alone, unarmed, and almost mortally wounded through two thousand miles of wilderness.