Newburyport Harbor (Plum Island) Light - Black and white photograph showing 1793 tower. - http://www.uscg.mil/hq/g-cp/history/WEBLIGHTHOUSES/newburyport1793.JPG
Newburyport Harbor Range Lights - Black and white photograph, from the U.S. Coast Guard. - http://www.uscg.mil/hq/g-cp/history/WEBLIGHTHOUSES/newburyportrangerear.JPG
Plum Island Light - History, photos plus descriptive information on lighthouse which now stands on the grounds of the headquarters of the Parker River National Wildlife Refuge. - http://www.lighthouse.cc/plumisland/index.html
Newburyport Harbor Range Lighthouses - Interesting facts, such as year established, exterior markings and patterns, height of focal plane and others. Located near Newburyport, Massachusetts. - http://www.cr.nps.gov/maritime/light/newbury.htm