Map of Oahu, Ursula Emerson, 1833 - Public domain map

Island of Oahu, Ursula Emerson, 1833. Mrs. Emerson's map of Oahu, as do her other maps, reflects a more accurate knowledge of the island than was indicated on printed maps available at the time. Her husband John later displayed considerable skill in surveying, so it is conceivable that he may have contributed to this map.