This piece of human leather is Chauncey Millard's.
Chauncey Millard was a drifter from the East. He made his way west and was hired on with Lehi freighters, Harland Swett and Chauncey Mayfield. On December 11, 1868, while camped west of Utah Lake, Millard shot and killed Swett and attempted to kill Mayfield, Millard escaped to Cedar Valley but was captured on December 18, 1868, by Porter Rockwell. Chauncey Millard was transported to Provo to stand trial. Millard traded his body to Dr. Roberts for a pound of candy. On January 29, 1869, after eating his candy, he was executed by firing squad. Dr. Roberts subsequently tanned the skin from Millard's body and used this piece to carry his surgical tools.