Noah Klein-Markman ’13 learned his first lesson at Wesleyan 20 minutes after arriving on campus. "I already lost the key," he said, carrying in two armloads of belongings. "I think I left the key inside the room." Klein-Markman, of Berkley, Calif., was one of the first students to move into the Butterfield Residence Hall during the Class of 2013 Arrival Day Sept. 1. He joined more than 800 other first-year, transfer, exchange and visiting students in the class. His mother, Laura Klein '78; father Henry Markman; and brother Sam Klein-Markman assisted Noah with the early morning move. The family dog,…