Ross, John O'Connell (1969). This Stern Coast: The Story of the Charting of the New Zealand Coast. Wellington: A H and A W Reed. p. 107. «[...] in 1822 Captain James Herd arrived in the ship Providence in search of spars. He entered the harbour and applied himself to a very adequate chart of the harbour and its approaches.»
Berzin A.; Ivashchenko V.Y.; Clapham J.P.; Brownell L.R. Jr. (2008). «The Truth About Soviet Whaling: A Memoir». DigitalCommons@University of Nebraska - Lincoln. Consultado el 15 de enero de 2016.