^Portlock, Nathaniel. A voyage round the world but more particularly to the north-west coast of America: performed in 1785, 1786, 1787, and 1788, in the King George and Queen Charlotte, Captains Portlock and Dixon. London: J. Stockdale and G. Goulding. 1789. OCLC 221899194. OL 6961184M.
^Report of the Committee, to Whom was Referred a Resolution of the House of Representatives of the 19th of December last, directing an Inquiry into the Situation of the Settlements on the Pacific Ocean, and the Expediency of Occupying the Columbia River; Accompanied with aBill to Authorize the Occupation of the Columbia River, &c.,January 25, 1821.Read, and with the Bill Committed to a Committee of the Whole House, to-morrow, 16thCongress, 2nd Session, Serial Set Vol.No.57, Session Vol.No.1, H.Rpt.45, House Report, p.13. .
^George Vancouver, A Voyage of Discovery to theNorth Pacific Ocean, and Round the World, London: G. G.and J. Robinson,1798, Vol.1, pp.172-173; Albert P.Taylor,Under Hawaiian Skies, A Narrative of the Romance, Adventure and History ofthe Hawaiian Islands, A Complete Historical Account, Honolulu: The Advertiser Publishing Company, 1926, p.149.
^W.D.Alexander, A Brief History of the Hawaiian People, New York: American Book Company, 1899, p.158.
^Charles Gutzlaff, A Sketch of Chinese History, Ancient and Modern,Vol.2, London: Smith, Elder and Co., Cornhill, 1834, Appendix IV.