Life at Princeton begins on moving-in day, captured in this image by former University photographer Bob Matthews during Freshman Week in 1980. Who can forget the excitement of those first moments on campus, the wonderful strangeness of the surroundings, or the poignancy of mom and dad’s goodbyes? Members of the Class of 2013 arrived on campus Sept. 12 and moved into the University’s six residential ­colleges. Their predecessors silhouetted here seem to be headed toward Little Hall, part of Mathey College.