Peter Hartley of Wheat Ridge, Colo., died November 28, 2010. A professor emeritus, he was born in 1936 and joined Mines in 1974 as an assistant professor in humanities and social sciences. He retired in 1999 and was on transition until 2004. Before coming to Mines, Peter taught at the University of Wyoming and in public school in Minisink, New York. He enjoyed running, hunting, and hiking, and was a staunch environmentalist. Peter is survived by his wife of 51 years, Sharon; daughter Cara; son Ryder; and grandson Michael.