On a morning in September 2009 that he will never forget, John C. Wright, a longtime professor of chemistry at UW-Madison, was getting ready to walk from his office to the class he was scheduled to teach when his telephone rang. That call, and a fax that followed a short time later, directing him to a website, knocked Wright for a loop. He is not an emotional person, but Wright teared up reading an article on the website. “I was astonished,” he said recently. He needed a little walk to calm down before teaching his class. What Wright, 67, learned that September morning set in motion a series of events that culminated last month when he and his family flew to England for the unveiling ceremony of a memorial plaque honoring the father Wright never knew.