The bullet passed through 9 folds of the blanket

"My brother was shot through the center of the body, and through the ligaments at the hips, so that he fell.  When he rose again, he said he saw an Indian loading his gun in full view so that he could have shot him, with the greatest ease, but that he was too weak and turned to run.  By this time the Indian had loaded and fired again.  The bullet passed through 9 folds of the blanket he had rolled up and strapped to his shoulders, and then stopped, and made flat as a 9d.  The force of the blow knocked him down again, but did not get through the blanket to the skin" (Draper MSS, James Wade Interview, 12cc11-41).

Draper, Lyman C. Draper Manuscript Collection: Series Cc; Kentucky Papers. Chicago: University of Chicago Library, Dept. of Photoreproduction, 1966. Archival material.